[libcxx] Ensure CLANG_VERSION_MAJOR is defined in clang-tidy checks (#228127) Otherwise the ifdefs around CLANG_VERSION_MAJOR for whether or not we should be including ClangTidyModule.h or ClangTidyModuleRegistry.h are all wrong given CLANG_VERSION_MAJOR is undefined. This is needed for bumping the CI container. GitOrigin-RevId: bbbbdc1fe3de8ed1d6094daca0e91d83f95b5d30