* and stop setting default values in python operator code, so defaults can be set at the server side.

This issue is just for the PR and questions from maintainers. 
airflow/providers/yandex/operators/yandexcloud_dataproc.py
cluster_id = self.cluster_id or context['task_instance'].xcom_pull(key='cluster_id')
        connection_id = self.connection_id or context['task_instance'].xcom_pull(
            key='yandexcloud_connection_id'
        )
        self.hook = DataprocHook(
            connection_id=connection_id,
        )
        self.hook.client.create_spark_job(
            main_class=self.main_class,
            main_jar_file_uri=self.main_jar_file_uri,
            jar_file_uris=self.jar_file_uris,
            archive_uris=self.archive_uris,
            file_uris=self.file_uris,
            args=self.args,
            properties=self.properties,
            name=self.name,
            cluster_id=cluster_id,
        )
class DataprocCreatePysparkJobOperator(BaseOperator):