Improve direct spirv backend test coverage.

[csyonghe]

These tests are currently running for glsl path but not direct to spirv:

tests\hlsl-intrinsic\ray-tracing\rt-pipeline-intrinsics-ahit.slang
tests/hlsl-intrinsic/ray-tracing/rt-pipeline-intrinsics-rgen.slang
tests\gpu-feature\texture\query\footprint\nv-shader-texture-footprint.slang
tests/gpu-feature/texture/query/footprint/nv-shader-texture-footprint-simple.slang
tests/vkray/callable.slang
tests/vkray/anyhit.slang