[llvm] [SPIRV] Preserve AMDGPU metadata through NonSemantic.AuxData (PR #215510)

[Marcos Maronas via llvm-commits]

maarquitos14 wrote:

@MrSidims @aobolensk I addressed your comments from https://github.com/llvm/llvm-project/pull/213685 in here already. Let me know if you agree with the resolution :)

https://github.com/llvm/llvm-project/pull/215510