[clang] [Clang] fix parser recovery for invalid static_assert string messages (PR #187859)

[Shafik Yaghmour via cfe-commits]

shafik wrote:

bisect points to this commit: https://github.com/llvm/llvm-project/pull/102044 it may help you formulate a better fix.

https://github.com/llvm/llvm-project/pull/187859