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

[Weibo He via llvm-commits]

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NewSigma wrote:

Could you please further reduce this test? A test file of ~7000 lines is much larger than the others.

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