[clang] [clang] Simplify the overload resolution logic for operator new and new[] (PR #211482)

[Oliver Hunt via cfe-commits]

ojhunt wrote:

I also considered a side table mapping CXXNewExpr=>resolved allocation arguments, but that requires serializing a deserializing that list as well. But maybe that's reasonable?

https://github.com/llvm/llvm-project/pull/211482