[clang] [llvm] [Clang][Coroutines] Introducing the `[[clang::coro_inplace_task]]` attribute (PR #94693)

[Yuxuan Chen via cfe-commits]

yuxuanchen1997 wrote:

Closing this PR as we are discussing on https://discourse.llvm.org/t/language-extension-for-better-more-deterministic-halo-for-c-coroutines/

and as suggested this PR is split into a FE PR https://github.com/llvm/llvm-project/pull/98971 and a ME PR https://github.com/llvm/llvm-project/pull/98974

https://github.com/llvm/llvm-project/pull/94693