Add Mesh and Task shader support to GFX (#3190)

* Bump vulkan headers

Also just use vulkan-headers as a submodule

* Add drawMeshTasks to gfx graphics pipelines

* Add DispatchMesh overload with no payload, with GLSL intrinsic

* Require spirv 1.4 for mesh shaders

* Add vulkan mesh shader feature discovery

* Add mesh shader stage bits to vk-util

* Add mesh and task shader support to render-test

* Add mesh and task tests

* Preserve "payload" specifier in task shaders

* Add mesh shader pipeline support to gfx

* Add TODO

* Add numThreads attribute for amplification stage

* Add payload to task shader test

* Drop dependency on d3dx12

* Allow passing payloads from task to mesh shaders

* regenerate vs projects

* check DispatchMesh name correctly

* Add mesh shader tests to failing tests

* Detect wave-ops feature on vulkan

* Add fuse-product to expected failures

This fails because the global varaible `count` is not initialized

* Add required extension to WaveMaskMatch SPIR-V impl

* Remove meshShader member from pipeline desc

* Identify mesh shader support on d3d12

1 files changed, 0 insertions, 274 deletions

diff --git a/external/vulkan/BUILD.md b/external/vulkan/BUILD.md
deleted file mode 100644
index 118813486..000000000
--- a/external/vulkan/BUILD.md
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@@ -1,274 +0,0 @@
-# Build Instructions
-
-Instructions for building this repository on Windows, Linux, and MacOS.
-
-## Index
-
-1. [Contributing](#contributing-to-the-repository)
-1. [Repository Content](#repository-content)
-1. [Repository Set-up](#repository-set-up)
-1. [Windows Build](#building-on-windows)
-1. [Linux Build](#building-on-linux)
-1. [MacOS Build](#building-on-macos)
-
-## Contributing to the Repository
-
-The contents of this repository are sourced primarily from the Khronos Vulkan
-API specification [repository](https://github.com/KhronosGroup/Vulkan-Docs).
-Please visit that repository for information on contributing.
-
-## Repository Content
-
-This repository contains the Vulkan header files and the Vulkan API definition
-(registry) with its related files. This repository does not create libraries
-or executables.
-
-However, this repository contains CMake build configuration files to "install"
-the files from this repository to a specific install directory. For example,
-you can install the files to a system directory such as `/usr/local` on Linux.
-
-If you are building other Vulkan-related repositories such as
-[Vulkan-Loader](https://github.com/KhronosGroup/Vulkan-Loader),
-you need to build the install target of this repository and provide the
-resulting install directory to those repositories.
-
-### Installed Files
-
-The `install` target installs the following files under the directory
-indicated by *install_dir*:
-
-- *install_dir*`/include/vulkan` : The header files found in the
- `include/vulkan` directory of this repository
-- *install_dir*`/share/vulkan/registry` : The registry files found in the
-  `registry` directory of this repository
-
-The `uninstall` target can be used to remove the above files from the install
-directory.
-
-## Repository Set-Up
-
-### Download the Repository
-
-To create your local git repository:
-
-    git clone https://github.com/KhronosGroup/Vulkan-Headers.git
-
-### Repository Dependencies
-
-This repository does not depend on any other repositories.
-
-### Build and Install Directories
-
-A common convention is to place the build directory in the top directory of
-the repository with a name of `build` and place the install directory as a
-child of the build directory with the name `install`. The remainder of these
-instructions follow this convention, although you can use any name for these
-directories and place them in any location.
-
-## Building On Windows
-
-### Windows Development Environment Requirements
-
-- Windows
-  - Any Personal Computer version supported by Microsoft
-- Microsoft [Visual Studio](https://www.visualstudio.com/)
-  - Versions
-    - [2015](https://www.visualstudio.com/vs/older-downloads/)
-    - [2017](https://www.visualstudio.com/vs/older-downloads/)
-    - [2019](https://www.visualstudio.com/vs/downloads/)
-  - The Community Edition of each of the above versions is sufficient, as
-    well as any more capable edition.
-- [CMake 3.10.2](https://cmake.org/files/v3.10/cmake-3.10.2-win64-x64.zip) is recommended.
-  - Use the installer option to add CMake to the system PATH
-- Git Client Support
-  - [Git for Windows](http://git-scm.com/download/win) is a popular solution
-    for Windows
-  - Some IDEs (e.g., [Visual Studio](https://www.visualstudio.com/),
-    [GitHub Desktop](https://desktop.github.com/)) have integrated
-    Git client support
-
-### Windows Build - Microsoft Visual Studio
-
-The general approach is to run CMake to generate the Visual Studio project
-files. Then either run CMake with the `--build` option to build from the
-command line or use the Visual Studio IDE to open the generated solution and
-work with the solution interactively.
-
-#### Windows Quick Start
-
-From a "Developer Command Prompt for VS 201x" console:
-
-    cd Vulkan-Headers
-    mkdir build
-    cd build
-    cmake ..
-    cmake --build . --target install
-
-See below for the details.
-
-#### Use `CMake` to Create the Visual Studio Project Files
-
-From within a "Developer Command Prompt for VS 201x" console, change your
-current directory to the top of the cloned repository directory, create a
-build directory and generate the Visual Studio project files:
-
-    cd Vulkan-Headers
-    mkdir build
-    cd build
-    cmake ..
-
-> Note: The `..` parameter tells `cmake` the location of the top of the
-> repository. If you place your build directory someplace else, you'll need to
-> specify the location of the repository top differently.
-
-The CMake configuration files set the default install directory location to
-`$CMAKE_BINARY_DIR\install`, which is a child of your build directory. In this
-example, the install directory becomes the `Vulkan-Headers\build\install`
-directory.
-
-The project installs the header files to
-
-    Vulkan-Headers\build\install\include\vulkan
-
-and installs the registry files to
-
-    Vulkan-Headers\build\install\share\vulkan\registry
-
-You can change the install directory with the `CMAKE_INSTALL_PREFIX` CMake
-variable.
-
-For example:
-
-    cd Vulkan-Headers
-    mkdir build
-    cd build
-    cmake -DCMAKE_INSTALL_PREFIX=/c/Users/dev/install ..  # MINGW64 shell
-
-As it starts generating the project files, `cmake` responds with something
-like:
-
-    -- Building for: Visual Studio 14 2015
-
-which is a 32-bit generator.
-
-Since this repository does not compile anything, there is no need to specify a
-specific generator such as "Visual Studio 14 2015 Win64", so the default
-generator should suffice.
-
-The above steps create a Windows solution file named `Vulkan-Headers.sln` in
-the build directory.
-
-At this point, you can build the solution from the command line or open the
-generated solution with Visual Studio.
-
-#### Build the Solution From the Command Line
-
-While still in the build directory:
-
-    cmake --build . --target install
-
-to build the install target.
-
-Build the `uninstall` target to remove the files from the install directory.
-
-    cmake --build . --target uninstall
-
-#### Build the Solution With Visual Studio
-
-Launch Visual Studio and open the "Vulkan-Headers.sln" solution file in the
-build directory. Build the `INSTALL` target from the Visual Studio solution
-explorer.
-
-Build the `uninstall` target to remove the files from the install directory.
-
-> Note: Since there are only the `INSTALL` and `uninstall` projects in the
-> solution, building the solution from the command line may be more efficient
-> than starting Visual Studio for these simple operations.
-
-## Building On Linux
-
-### Linux Development Environment Requirements
-
-There are no specific Linux distribution or compiler version requirements for
-building this repository. The required tools are
-
-- [CMake 3.10.2](https://cmake.org/files/v3.10/cmake-3.10.2-Linux-x86_64.tar.gz) is recommended.
-- git
-
-### Linux Build
-
-The general approach is to run CMake to generate make files. Then either run
-CMake with the `--build` option or `make` to build from the command line.
-
-#### Linux Quick Start
-
-    cd Vulkan-Headers
-    mkdir build
-    cd build
-    cmake -DCMAKE_INSTALL_PREFIX=install ..
-    make install
-
-See below for the details.
-
-#### Use CMake to Create the Make Files
-
-Change your current directory to the top of the cloned repository directory,
-create a build directory and generate the make files:
-
-    cd Vulkan-Headers
-    mkdir build
-    cd build
-    cmake -DCMAKE_INSTALL_PREFIX=install ..
-
-> Note: The `..` parameter tells `cmake` the location of the top of the
-> repository. If you place your `build` directory someplace else, you'll need
-> to specify the location of the repository top differently.
-
-Set the `CMAKE_INSTALL_PREFIX` variable to the directory to serve as the
-destination directory for the `install` target.
-
-The above `cmake` command sets the install directory to
-`$CMAKE_BINARY_DIR/install`, which is a child of your `build` directory. In
-this example, the install directory becomes the `Vulkan-Headers/build/install`
-directory.
-
-The make file install target installs the header files to
-
-    Vulkan-Headers/build/install/include/vulkan
-
-and installs the registry files to
-
-    Vulkan-Headers/build/install/share/vulkan/registry
-
-> Note: For Linux, the default value for `CMAKE_INSTALL_PREFIX` is
-> `/usr/local`, which would be used if you do not specify
-> `CMAKE_INSTALL_PREFIX`. In this case, you may need to use `sudo` to install
-> to system directories later when you run `make install`.
-
-Note that after generating the make files, running `make`:
-
-    make
-
-does nothing, since there are no libraries or executables to build.
-
-To install the header files:
-
-    make install
-
-or
-
-    cmake --build . --target install
-
-To uninstall the files from the install directories, you can execute:
-
-    make uninstall
-
-or
-
-    cmake --build . --target uninstall
-
-## Building on MacOS
-
-The instructions for building this repository on MacOS are similar to those for Linux.
-
-[CMake 3.10.2](https://cmake.org/files/v3.10/cmake-3.10.2-Darwin-x86_64.tar.gz) is recommended.