Avoid __ne__ weakref comparison and use identity instead in cache_size.py (#135000)

Pull Request resolved: #135000
Approved by: https://github.com/anijain2305

Author: vmoens

torch/_dynamo/cache_size.py

@@ -124,7 +124,7 @@ def _has_same_id_matched_objs(frame: types.FrameType, cache_entry) -> bool:
     ) in cache_entry.check_fn.id_matched_objs.items():
         if weakref_from_cache_entry() is not None:
             weakref_from_frame = _get_weakref_from_f_locals(frame, local_name)
-            if weakref_from_frame != weakref_from_cache_entry:
+            if weakref_from_frame is not weakref_from_cache_entry:
                 return False
 
     # Also covers the case where no ID_MATCH objects are saved in frame.f_locals