[clang] [clang-tools-extra] Reapply "[Clang][Sema] Diagnose class member access expressions naming non-existent members of the current instantiation prior to instantiation in the absence of dependent base classes (#84050)" (PR #90152)

[Luke Lau via cfe-commits]

lukel97 wrote:

Hi, this seems to uncover an unfortunate error in xalan-c https://github.com/apache/xalan-c/blob/c326619da4813acfc845c2830d904a4860f9afe1/src/xalanc/XMLSupport/XalanOtherEncodingWriter.hpp#L323 which is present in one of the SPEC CPU 2017 benchmarks (and prevents SPEC CPU 2017 from being built)

The error in xalan-c looks to be real since I can't find any definition of `m_isPresentable`, so I don't think this is an issue with this patch per say. Thought I'd flag this anyway in case others are running into the same issue.

https://github.com/llvm/llvm-project/pull/90152