[llvm] [profcheck] Add indirect call metadata (PR #154657)

[Mingming Liu via llvm-commits]

https://github.com/mingmingl-llvm approved this pull request.

The change itself LGTM. The profile injector pass is only integrated into `opt` and [off by default](https://github.com/llvm/llvm-project/blob/3a715107c2ce244081ae043b7006eaa704a13ab6/llvm/tools/opt/optdriver.cpp#L220-L228).

I'll catch up on the rfc for more about this work.

https://github.com/llvm/llvm-project/pull/154657