[clang] [llvm] [Clang] restrict use of attribute names reserved by the C++ standard (PR #106036)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

FWIW, LWG is still discussing the issue while trying to prioritize it, and it's got a reasonable amount of discussion on it. I think we should hold off making any changes or landing this patch until we have a better sense of whether LWG is going to refine this restriction or not.

https://github.com/llvm/llvm-project/pull/106036