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

[Krystian Stasiowski via cfe-commits]

sdkrystian wrote:

@felipepiovezan I tested without this patch applied and was still seeing crashes... could you perhaps see if https://github.com/sdkrystian/llvm-project/tree/reapply-use-latest-primary fixes the regression?

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