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

[Erich Keane via cfe-commits]

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

This seems sensible to me.  A little curious as to 'most recent' vs 'definition' here, but you're likely correct having read the rest of hte patch.

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