Fail slang-test when VVL printed errors (#8280)

fixes https://github.com/shader-slang/slang/issues/8271

This PR does the following,
- Fail slang-test when there are VVL error messages.
- VVL error for `gfx-unit-test-tool/` were not captured properly by the
debug callback.
- Set an environment variable,
`VK_INSTANCE_LAYERS=VK_LAYER_KHRONOS_validation`, for CI and
VisualStudio project setup.
- Ignores VVL error about NullHandle is used for the acceleration
structure; a fix is at ToT of VVL and not available from release build
yet.
- Fix VVL error complaining about the varying inputs are not provided
for the tests, `gfx-unit-test-tool/linkTimeTypeLayout.internal` and
`gfx-unit-test-tool/linkTimeTypeLayoutNested.internal`.

---------

Co-authored-by: slangbot <ellieh+slangbot@nvidia.com>
Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/expected-failure-github.txt b/tests/expected-failure-github.txt
index d647417f2..fdf7f447f 100644
--- a/tests/expected-failure-github.txt
+++ b/tests/expected-failure-github.txt
@@ -1,4 +1,3 @@
-
 tests/cooperative-vector/matrix-mul-bias-mut.slang (vk)
 tests/cooperative-vector/matrix-mul-bias-packed-mut.slang (vk)
 tests/cooperative-vector/matrix-mul-bias-packed.slang (vk)
@@ -35,3 +34,6 @@ tests/compute/interface-shader-param.slang.5 syn (wgpu)
 tests/language-feature/shader-params/interface-shader-param-ordinary.slang.4 syn (wgpu)
 tests/glsl-intrinsic/shader-subgroup/shader-subgroup-builtin-variables.slang.8 (mtl)
 tests/glsl-intrinsic/shader-subgroup/shader-subgroup-builtin-variables-2.slang.3 (mtl)
+
+# GitHub issue #8289; VVL prints an error incorrectly; it will be resolved with a next VulkanSDK
+gfx-unit-test-tool/samplerArrayVulkan.internal