adjust for callback_connector protection

Author: speediedan

pytorch_lightning/callbacks/finetuning_scheduler/fts_supporters.py

@@ -549,4 +549,4 @@ def _configure_callback_deps(self, trainer: "pl.Trainer") -> List[Callback]:
         # ensure existing callback_connector logic is adhered to. Adding an FTS configuration method to
         # CallbackConnector or forcing users to manually add default EarlyStopping and FTSCheckpoint classes
         # would avoid this callback_connector call
-        return trainer.callback_connector._reorder_callbacks(trainer.callbacks)
+        return trainer._callback_connector._reorder_callbacks(trainer.callbacks)