[llvm] [LTO][Pipelines][Coro] Handle coroutines in LTO pipeline (PR #126168)

[Teresa Johnson via llvm-commits]

https://github.com/teresajohnson approved this pull request.

lgtm with the caveat that I don't know the correct relative ordering of the Coro passes.

https://github.com/llvm/llvm-project/pull/126168