### Body

Use `AirflowProviderDeprecationWarning` as warning source in EMR operators and change stacklevel to 2:
https://github.com/apache/airflow/blob/05036e619c0c6dafded1451daac4e07e20aee33f/airflow/providers/amazon/aws/operators/emr.py#L380-L384
https://github.com/apache/airflow/blob/05036e619c0c6dafded1451daac4e07e20aee33f/airflow/providers/amazon/aws/operators/emr.py#L373-L377
https://github.com/apache/airflow/blob/05036e619c0c6dafded1451daac4e07e20aee33f/airflow/providers/amazon/aws/operators/emr.py#L264-L268
https://github.com/apache/airflow/blob/05036e619c0c6dafded1451daac4e07e20aee33f/airflow/providers/amazon/aws/operators/emr.py#L257-L261

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
"""Create and return an EmrServerlessHook."""
        return EmrServerlessHook(aws_conn_id=self.aws_conn_id)
    def execute(self, context: Context, event: dict[str, Any] | None = None) -> str | None:
        app_state = self.hook.conn.get_application(applicationId=self.application_id)["application"]["state"]
        if app_state not in EmrServerlessHook.APPLICATION_SUCCESS_STATES:
            self.log.info("Application state is %s", app_state)
            self.log.info("Starting application %s", self.application_id)
            self.hook.conn.start_application(applicationId=self.application_id)
            waiter = self.hook.get_waiter("serverless_app_started")
            if self.deferrable:
                self.defer(
                    trigger=EmrServerlessStartApplicationTrigger(
                        application_id=self.application_id,
                        waiter_delay=self.waiter_delay,
                        waiter_max_attempts=self.waiter_max_attempts,
                        aws_conn_id=self.aws_conn_id,
                    ),
                    method_name="execute",