* 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. 
tests/providers/yandex/operators/test_yandexcloud_dataproc.py
operator = DataprocCreateHiveJobOperator(
            task_id='create_hive_job',
            query='SELECT 1;',
        )
        context = {'task_instance': MagicMock()}
        context['task_instance'].xcom_pull.return_value = 'my_cluster_id'
        operator.execute(context)
        context['task_instance'].xcom_pull.assert_has_calls(
            [
                call(key='cluster_id'),
                call(key='yandexcloud_connection_id'),
            ]
        )
        create_hive_job_mock.assert_called_once_with(
            cluster_id='my_cluster_id',
            continue_on_failure=False,
            name='Hive job',
            properties=None,
            query='SELECT 1;',
            query_file_uri=None,
            script_variables=None,
        )
    @patch('airflow.providers.yandex.hooks.yandex.YandexCloudBaseHook._get_credentials')
    @patch('airflow.hooks.base.BaseHook.get_connection')
    @patch('yandexcloud._wrappers.dataproc.Dataproc.create_mapreduce_job')
    def test_create_mapreduce_job_operator(self, create_mapreduce_job_mock, *_):