[clang] Report range of the missing-memmber on no_member diagnostic.

[kadircet]

Summary

Currently no_member diagnostic only reports to range for the structs name, which
is not very useful when highlighting. This patch also adds the identifier which
caused diagnostic as a range. For example:

struct Foo {
  int x;
}
Foo foo;
foo.y;

only had [[foo]].y as a range and foo.^y as the location of the diagnostic.
After the patch it will have [[foo]].[[^y]] as ranges and location.

You can see the revision that adds a test in clangd as a dependent revision.

lib/Sema/SemaExprMember.cpp

if (ExtraArgs) {
         Diag(OpLoc, diag::err_no_member_overloaded_arrow)
           << MemberName << DC << FixItHint::CreateReplacement(OpLoc, "->");
         return RetryExpr;
       }
     }
 
     Diag(R.getNameLoc(), diag::err_no_member)
       << MemberName << DC
-      << (BaseExpr ? BaseExpr->getSourceRange() : SourceRange());
+      << (BaseExpr ? BaseExpr->getSourceRange() : SourceRange())
+      << MemberNameInfo.getSourceRange();
     return ExprError();
   }
 
   // Diagnose lookups that find only declarations from a non-base
   // type.  This is possible for either qualified lookups (which may
   // have been qualified with an unrelated type) or implicit member
   // expressions (which were found with unqualified lookup and thus
   // may have come from an enclosing scope).  Note that it's okay for