[clang] [Clang][Parser] Don't always destroy template annotations at the end of a declaration (PR #89494)

[via cfe-commits]

cor3ntin wrote:

Are there actually any benefit from being _that_ eager to delete template annotations?
Getting back to a place where who only delete at the end of Top level decls would avoid the new complexity, right?

That design question notwithstanding, the patch looks reasonable to me

@AaronBallman @shafik 

https://github.com/llvm/llvm-project/pull/89494