[clang] [AMDGPU] Remove Code Object V3 (PR #67118)

[Konstantin Zhuravlyov via cfe-commits]

https://github.com/kzhuravl approved this pull request.

This LGTM. But wait a couple of days to see if @arsenm or @yxsamliu have any objections?

https://github.com/llvm/llvm-project/pull/67118