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

[via cfe-commits]

cor3ntin wrote:

I'm not strongly opposed to merge that, however, i did confirm locally that  removing the call to `MaybeDestroyTemplateIds` in `ParseStatementOrDeclaration` fixes the bug.

We  currently destroy annotations
 - At the end of a top level decl (and extern decl)
 - At the end of a member specification
 - At the end of statements

Removing the last case would only impact long functions using lots of templates.  so the added complexity feels a bit brittle and unnecessary to to me but I'll let Aron have the last word :)




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