[llvm] [CGSCC] Fix compile time blowup with large RefSCCs (PR #94815)

[Lei Wang via llvm-commits]

wlei-llvm wrote:

> #98213 should fix the assert, let me know if you are still seeing issues. sorry for the trouble (we really need to remove CallGraphUpdater...)

Thanks for the quick fix, I will test it on our services shortly.

https://github.com/llvm/llvm-project/pull/94815