[clang] [clang] implement current direction of CWG2765 for string literal comparisons in constant evaluation (PR #109208)

[James Y Knight via cfe-commits]

jyknight wrote:

> I think that's a separable issue from this PR

Yep. I brought it up mainly in case consideration of that set of issues might necessitate design changes here. It sounds like that's not the case though, so I'm happy for it to not be a blocker for this PR.

https://github.com/llvm/llvm-project/pull/109208