[clang] [clang-tools-extra] [Clang][Sema] Diagnose current instantiation used as an incomplete base class (PR #92597)

[Erich Keane via cfe-commits]

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

Agreed, I think the standards compliance here is worth it to see what falls out of this.

https://github.com/llvm/llvm-project/pull/92597