[clang] [C++20][Coroutines] Lambda-coroutine with operator new in promise_type (PR #84193)

[Andreas Fertig via cfe-commits]

andreasfertig wrote:

> @andreasfertig Will you need us to merge that for you?

@cor3ntin: It looks like I need you, yes. I can only close the PR :-/

https://github.com/llvm/llvm-project/pull/84193