fix issue that some example with no trainer use accelerator.end_train… (#37435)

* fix issue that some example with no trainer use accelerator.end_training in a wrong way

* reformat code

---------

Co-authored-by: Marc Sun <57196510+SunMarc@users.noreply.github.com>

examples/pytorch/object-detection/run_object_detection_no_trainer.py

@@ -759,9 +759,6 @@ def main():
 
     logger.info(f"Test metrics: {metrics}")
 
-    if args.with_tracking:
-        accelerator.end_training()
-
     if args.output_dir is not None:
         accelerator.wait_for_everyone()
         unwrapped_model = accelerator.unwrap_model(model)
@@ -784,6 +781,9 @@ def main():
                     ignore_patterns=["epoch_*"],
                 )
 
+    accelerator.wait_for_everyone()
+    accelerator.end_training()
+
 
 if __name__ == "__main__":
     main()