[clang] [Clang][Sema] Always use latest redeclaration of primary template (PR #114258)

[Felipe de Azevedo Piovezan via cfe-commits]

felipepiovezan wrote:

>  That said, if you get to be somewhat more sure that this is the patch that caused it, feel free to revert and @sdkrystian will look at it more closely tomorrow.

I'm going to revert it for the time being to unblock the bots

https://github.com/llvm/llvm-project/pull/114258