[llvm] [PGO]add bitcode-use-sample-profile (PR #66178)

[Teresa Johnson via llvm-commits]

teresajohnson wrote:

Also, if you are going to use an internal attribute, how about using the existing -mllvm -force-attribute=use-sample-profile. The ForceFunctionAttrs pass runs early in the ThinLTO pre-link pipeline, before sample pgo.

https://github.com/llvm/llvm-project/pull/66178