[llvm] [Inline][WinEH] Fix try scopes leaking to caller on inline (PR #164170)

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MuellerMP wrote:

Thanks for your help @efriedma-quic - very much appreciated!
As you pointed out it probably makes more sense to try and fix this in the frontend as this will also make the handling less complex.

Will close this and come back if I have a better fix.

https://github.com/llvm/llvm-project/pull/164170