Fix atomic operations on RWBuffer (#593)

* Fix atomic operations on RWBuffer

An earlier change added support for passing true pointers to `__ref` parameters to fix the global `Interlocked*()` functions when applied to `groupshared` variables or `RWStructureBuffer<T>` elements.
That change didn't apply to `RWBuffer<T>` or `RWTexture2D<T>`, etc. because those types had so far only declared `get` and `set` accessors, but not any `ref` accessors (which return a pointer).

The main fixes here are:

* Add `ref` accessors to the subscript oeprations on the `RW*` resource types

* Adjust the logic for emitting calls to subscript accessors so that we don't get quite as eager about invoking a `ref` accessor, and instead try to invoke just a `get` or `set` accessor when these will suffice. This is important for Vulkan cross-compilation, where we don't yet support the semantics of our `ref` accessors.

* Add a test case for atomics on a `RWBuffer`

* Fix up `render-test` so that we can specify a format for a buffer resource, which allows us to use things other than `*StructuredBuffer` and `*ByteAddressBuffer`. The work there is probably not complete; I just did what I could to get the test working.

* A bunch of files got whitespace edits thanks to the fact that I'm using editorconfig and others on the project seemingly arent...

* fixup: remove ifdefed-out code

1 files changed, 5 insertions, 2 deletions

diff --git a/tools/render-test/shader-input-layout.h b/tools/render-test/shader-input-layout.h
index 0f5a54326..7537527ab 100644
--- a/tools/render-test/shader-input-layout.h
+++ b/tools/render-test/shader-input-layout.h
@@ -3,6 +3,8 @@
 
 #include "core/basic.h"
 
+#include "render.h"
+
 namespace renderer_test {
 
 enum class ShaderInputType
@@ -35,6 +37,7 @@ struct InputBufferDesc
 {
     InputBufferType type = InputBufferType::ConstantBuffer;
     int stride = 0; // stride == 0 indicates an unstructured buffer.
+    Format format = Format::Unknown;
 };
 
 struct InputSamplerDesc
@@ -52,7 +55,7 @@ public:
     InputSamplerDesc samplerDesc;
     bool isOutput = false;
     int hlslBinding = -1;
-    Slang::List<int> glslBinding;       
+    Slang::List<int> glslBinding;
 };
 
 struct TextureData
@@ -76,4 +79,4 @@ void generateTextureData(TextureData & output, const InputTextureDesc & desc);
 
 } // namespace render_test
 
-#endif
\ No newline at end of file
+#endif