Revert "[clang] Unify `SourceLocation` and `IdentifierInfo*` pair-like data structures to `IdentifierLoc`"#135974

Michael137 merged 1 commit intomainllvm/llvm-project:mainfrom

revert-135808-unify_identifier_locllvm/llvm-project:revert-135808-unify_identifier_locCopy head branch name to clipboard