[clang] [clang] fix P3310 overload resolution flag propagation (PR #125372)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

> Probably best to pass a constant `false`/`true` to preserve old behaviour. We can't even instantiate templates in the expression evaluator right now, so don't think we should be worrying about this at the moment

Please see https://github.com/llvm/llvm-project/pull/125791#discussion_r1942098945

https://github.com/llvm/llvm-project/pull/125372