[clang] [Clang] handle invalid close location in static assert declaration (PR #108701)

[Oleksandr T. via cfe-commits]

a-tarasyuk wrote:

@AaronBallman Thanks for the review.

If these changes seem fine, could someone merge them? I don't have the required permissions. thanks

https://github.com/llvm/llvm-project/pull/108701