Extend possible error location in overloads_definitions.py (#2004)

Allow highlighting decorator instead of a function name in overloads_definitions.py

Author: PetrGolubev

conformance/tests/overloads_definitions.py

@@ -194,7 +194,7 @@ def bad_override(self, x: int) -> int:  # E[bad_override]
     @overload
     def bad_override(self, x: str) -> str: ...
 
-    @override
+    @override  # E[bad_override]
     def bad_override(self, x: int | str) -> int | str:  # E[bad_override]
         ...