[llvm] [Coroutines] fix coroutines + std::unique_ptr with async exceptions validation errors (PR #149691)

[Chuanqi Xu via llvm-commits]

https://github.com/ChuanqiXu9 commented:

Sorry for not finding time to look at this in detail. One of my concern is, this is for windows-specific issues, but the current patch would introduce unnecessary overhead for non-windows users. 

https://github.com/llvm/llvm-project/pull/149691