[clang] [clang][AST] Fix end location of DeclarationNameInfo on instantiated methods (PR #92654)

[Haojian Wu via cfe-commits]

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

nit: add a note in `clang/docs/ReleaseNotes.rst` 

https://github.com/llvm/llvm-project/pull/92654