[llvm] [SPIRV][HLSL] Add HLSL intrinsic tests (PR #86844)

[Vyacheslav Levytskyy via llvm-commits]

VyacheslavLevytskyy wrote:

Would it make sense to add something like
```; RUN: %if spirv-tools %{ llc -O0 mtriple=spirv-unknown-linux %s -o - -filetype=obj | spirv-val %}```
to each test to be sure that the output is valid from the perspective of `spirv-val`?

https://github.com/llvm/llvm-project/pull/86844