* 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_hive_job(
            query=self.query,
            query_file_uri=self.query_file_uri,
            script_variables=self.script_variables,
            continue_on_failure=self.continue_on_failure,
            properties=self.properties,
            name=self.name,
            cluster_id=cluster_id,
        )
class DataprocCreateMapReduceJobOperator(BaseOperator):