[clang] [libcxx] [llvm] Reapply "[Clang] Implement resolution for CWG1835 (#92957)" (PR #98547)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

Given the amount of pain involved, I think this should be applied as a C++23 change rather than applied as a DR. I'd like to avoid adding a feature flag for this if possible (I'd prefer warning-default-as-error instead, but that doesn't seem particularly plausible here), but the cross-compiler behavior story may be sufficiently painful to make it worth considering.

https://github.com/llvm/llvm-project/pull/98547