Auto modelcard (#11599)

* Autogenerate model cards from the Trainer

* ModelCard deprecated

* Fix test

* Style

* Apply suggestions from code review

Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>

* Address review comments

* Quality

* With all metadata

* Metadata

* Post-merge conflict mess

* Data args and all examples

* Default license and languages when possible

Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>

tests/test_trainer.py

@@ -1168,7 +1168,6 @@ class TrainerIntegrationWithHubTester(unittest.TestCase):
     def test_push_to_hub(self):
         with tempfile.TemporaryDirectory() as tmp_dir:
             trainer = get_regression_trainer(output_dir=tmp_dir)
-            trainer.save_model()
             url = trainer.push_to_hub(repo_name="test-trainer", use_auth_token=self._token)
 
             # Extract repo_name from the url