[llvm] [ctxprof] don't inline weak symbols after instrumentation (PR #128811)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

It doesn't appear to take a hit. Not completely surprising: we already do some inlining before instrumentation.

If we ever want to avoid taking any hit, we can subsequently add some metadata to each such function capturing the original (if any) inline attribute; go through thinlto; then restore the original attribute from metadata after function import and let the backend inliner do its job (which, at this point, would be only working with prevailing copies)

https://github.com/llvm/llvm-project/pull/128811