[llvm] [AMDGPU] Add an asm directive to track code_object_version (PR #76267)

[Scott Linder via llvm-commits]

slinder1 wrote:

Requesting review from @MaskRay as someone outside AMD to look, in particular because of the generic change needed in `MCAssembler`.

https://github.com/llvm/llvm-project/pull/76267