[llvm] [Coroutines][LazyCallGraph] resumes are not really SCC (PR #116285)

[Arthur Eubanks via llvm-commits]

https://github.com/aeubanks commented:

having thought about this a bit more, I think this use case makes sense and this change is fine. we can use the fact that spurious ref edges are ok (I hope this doesn't come back to bite us)

we should add more comments explaining this case where the new functions may not necessarily reference each other and that's ok due to spurious ref edges being allowed

https://github.com/llvm/llvm-project/pull/116285