[clang] [Sema] Fix assertion crash on section conflict with a non-identifier decl (PR #200873)

[via cfe-commits]

lijinpei-amd wrote:

Thanks @cor3ntin! Added a release note under "Bug Fixes to Attribute Support" in `clang/docs/ReleaseNotes.rst` referencing #192264. Also fixed a stale `} // namespace` comment left over from the `GH192264` rename. PTAL.

https://github.com/llvm/llvm-project/pull/200873