[clang] [clang][Parser] Pop scope prior VarDecl invalidating by invalid init (PR #77434)

[Shafik Yaghmour via cfe-commits]

https://github.com/shafik commented:

This makes sense to me but I would like @cor3ntin to review as well.

This needs a release note.

I see that there was two test cases. Do you think it is worth it to add the second test case as well?

https://github.com/llvm/llvm-project/pull/77434