[clang] [clang] pointer to member with qualified-id enclosed in parentheses in unevaluated context should be invalid (PR #89713)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> I can try to look at that this week. Either way be ill-formed is much better than being incorrect

Thank you @cor3ntin! If it looks like you won't have a solution by Monday sometime, let's revert the changes so they don't end up on the release branch. We can cherry-pick if we think we have a rock solid solution, if needs be.

https://github.com/llvm/llvm-project/pull/89713