[llvm] [Coroutines] Allocas used after @coro.end should not go in the coro frame (PR #127524)

[Hans Wennborg via llvm-commits]

https://github.com/zmodem commented:

Taking a stab at fixing https://github.com/llvm/llvm-project/issues/127499, but would appreciate some additional coroutine expertise :) Please take a look.

https://github.com/llvm/llvm-project/pull/127524