[clang] [LifetimeSafety] Add ExpireOriginFact to fix false positives for pointers in loops (PR #182368)

[Gábor Horváth via cfe-commits]

https://github.com/Xazax-hun commented:

Do we need a new fact? Couldn't we make this work by handling `ExpireFact` in liveness analysis?

https://github.com/llvm/llvm-project/pull/182368