Deprecate model_path in Trainer.train (#9854)

templates/adding_a_new_example_script/{{cookiecutter.directory_name}}/run_{{cookiecutter.example_shortcut}}.py

@@ -341,20 +341,20 @@ def main():
     if training_args.do_train:
 {%- if cookiecutter.can_train_from_scratch == "False" %}
         if last_checkpoint is not None:
-            model_path = last_checkpoint
+            checkpoint = last_checkpoint
         elif os.path.isdir(model_args.model_name_or_path):
-            model_path = model_args.model_name_or_path
+            checkpoint = model_args.model_name_or_path
         else:
-            model_path = None
+            checkpoint = None
 {%- elif cookiecutter.can_train_from_scratch == "True" %}
         if last_checkpoint is not None:
-            model_path = last_checkpoint
+            checkpoint = last_checkpoint
         elif model_args.model_name_or_path is not None and os.path.isdir(model_args.model_name_or_path):
-            model_path = model_args.model_name_or_path
+            checkpoint = model_args.model_name_or_path
         else:
-            model_path = None
+            checkpoint = None
 {% endif %}
-        train_result = trainer.train(model_path=model_path)
+        train_result = trainer.train(resume_from_checkpoint=checkpoint)
         trainer.save_model()  # Saves the tokenizer too for easy upload
 
         output_train_file = os.path.join(training_args.output_dir, "train_results.txt")