Fix loop examples after Accelerator API removals (#10514)

Author: ananthsub

pl_examples/loop_examples/kfold.py

@@ -205,7 +205,7 @@ def on_run_end(self) -> None:
         voting_model = EnsembleVotingModel(type(self.trainer.lightning_module), checkpoint_paths)
         voting_model.trainer = self.trainer
         # This requires to connect the new model and move it the right device.
-        self.trainer.accelerator.connect(voting_model)
+        self.trainer.training_type_plugin.connect(voting_model)
         self.trainer.training_type_plugin.model_to_device()
         self.trainer.test_loop.run()
 

pl_examples/loop_examples/yielding_training_step.py

@@ -86,7 +86,7 @@ def _training_step(self, generator):
         # Here, instead of calling `lightning_module.training_step()`
         # we call next() on the generator!
         training_step_output = next(generator)
-        self.trainer.accelerator.post_training_step()
+        self.trainer.training_type_plugin.post_training_step()
 
         training_step_output = self.trainer.call_hook("training_step_end", training_step_output)