[llvm] [AArch64][Win] Emit SEH instructions for the swift async context-related instructions in the prologue and the epilogue. (PR #66967)

[Saleem Abdulrasool via llvm-commits]

https://github.com/compnerd approved this pull request.

Thanks!  How did we not run into this before?

https://github.com/llvm/llvm-project/pull/66967