[clang] [Clang][Sema] Don't treat error-recovery dependence as genuine template dependence in ActOnTag (PR #221440)

[Anirudh Mathur via cfe-commits]

AnirudhMathur12 wrote:

@Endilll @hokein, tagging you both since you've recently worked in this area — would appreciate a review whenever you have a moment.

https://github.com/llvm/llvm-project/pull/221440