[clang] [coroutines] Detect lifetime issues with coroutine lambda captures (PR #77066)

[Chuanqi Xu via cfe-commits]

https://github.com/ChuanqiXu9 commented:

Maybe it'll be better to say this is related to `[[coro_lifetimebound]]`. My instinct reaction to this is that "no, this is not strictly correct". But I feel good after I know it is an extension of `[[coro_lifetimebound]]` only.

https://github.com/llvm/llvm-project/pull/77066