[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)

[Krystian Stasiowski via cfe-commits]

sdkrystian wrote:

I built boost with `-DBUILD_TESTING=ON` and didn't see any regressions... hopefully that remains the case

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