[llvm] [SPIRV] Emitting DebugSource, DebugCompileUnit (PR #97558)

[Vyacheslav Levytskyy via llvm-commits]

https://github.com/VyacheslavLevytskyy requested changes to this pull request.

@bwlodarcz Thank you for this PR that introduces the "SPIR-V NonSemantic Shader DebugInfo Instructions" extension.

https://github.com/llvm/llvm-project/pull/97558