[clang] [clang] fix a crash for uses of a pseudo-destructor of enum without definition (PR #210424)

[Corentin Jabot via cfe-commits]

https://github.com/cor3ntin approved this pull request.

I would elect to forgo the release note and backport it to 23 (with a release note there).

LGTM otherwise

https://github.com/llvm/llvm-project/pull/210424