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

[via cfe-commits]

cor3ntin wrote:

I could use help understanding how to fix `clang/test/Templight/templight-empty-entries-fix.cpp` - it always eludes me how to make FileCheck happy @AaronBallman  

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