[clang] [llvm] [CoroSplit] Rise lifetime.end to get smaller frame size (PR #143333)

[Chuanqi Xu via llvm-commits]

https://github.com/ChuanqiXu9 commented:

If we can move lifetimes, this should be a general optimization. We don't have to (and shouldn't) put this in Coroutine passes. Let's make it a general pass and send it for review for wider visibility.

https://github.com/llvm/llvm-project/pull/143333