[clang] [llvm] [WinEH] Fix try scopes leaking to caller on inline (PR #167176)

[via llvm-commits]

MuellerMP wrote:

> Does this fix #62723?

Not yet, but I think this a valid point that should be considered for this fix since emitting a `seh.try.end` before the NullPtr deref does actually fix the issue.
My patch in its current state does not handle this since there is no scope change between the try and NullPtr deref.
It might make sense to handle fallthroughs in the `ExitCXXTryStmt` aswell in my fix.

https://github.com/llvm/llvm-project/pull/167176