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

[Yuxuan Chen via llvm-commits]

yuxuanchen1997 wrote:

I am a bit uncomfortable with general CGSCC mutation API changes. Reading the old diff, you referenced it looks like this design is deliberate. Don't we have the `.resumers` array GV for this? Would it work by fabricating another reference to it?

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