Fix bug with test_cv_multiple_metrics_evaluated_correct by adding cop…

…y method to OptimisedFeature

fedot/core/data/data.py

@@ -719,6 +719,9 @@ def __setitem__(self, key, value):
     def __len__(self):
         return self._shape[0] if self._columns else 0
 
+    def copy(self):
+        return self._columns.copy()
+
     @property
     def shape(self):
         return self._shape