[clang] [clang] improve suggested attribute location for scoped enums (PR #124122)

[Mariya Podchishchaeva via cfe-commits]

https://github.com/Fznamznon commented:

Thank you for the contribution, could you please also add a release note (similar to other release notes in llvm-project/clang/docs/ReleaseNotes.md) and a test (similar to some test in clang/test/Parser )?

https://github.com/llvm/llvm-project/pull/124122