[llvm] [InstrProf] Do not block functions from PGOUse (PR #71106)

[Ellis Hoag via llvm-commits]

ellishg wrote:

> I think we should move the size/compiletime related logics outside of skipPGO. There is no point annotate PGO (and waste compile time) when instrumentation is skipped.

If **instrumentation** is skipped then we should block PGOGen. But if a function is in a profile, we should still run PGOUse on that function and this would not waste compile time, even if it happens to have the `noprofile` attribute for whatever reason.

https://github.com/llvm/llvm-project/pull/71106