[llvm] [AMDGPU][True16][MC] VOP3 profile in True16 format (PR #109031)

[Ivan Kosarev via llvm-commits]

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

LGTM with a few minor things to refine. If you expect this to not land smoothly downstream, especially the test changes, please make sure to prepare a downstream version of the patch before submitting here.

https://github.com/llvm/llvm-project/pull/109031