[clang] [Clang][RFC] Bypass TAD during overload resolution if a perfect match exists (PR #133426)

[Erich Keane via cfe-commits]

https://github.com/erichkeane approved this pull request.

I have a handful of comments that are all nits/minor enough I trust you on, but overall this looks fine. 

Lets ship it!

https://github.com/llvm/llvm-project/pull/133426