[llvm] [X86][WinEH] Restore parent RSP before Win64 catchret continuation (PR #191616)

[Eli Friedman via llvm-commits]

https://github.com/efriedma-quic commented:

Please update the title/description of the pull request to match the commit.

Please make sure we have test coverage for cases where we have both dynamic allocation and arguments passed on the stack.

https://github.com/llvm/llvm-project/pull/191616