* 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/hooks/yandexcloud_dataproc.py
#
#
#
from airflow.providers.yandex.hooks.yandex import YandexCloudBaseHook
class DataprocHook(YandexCloudBaseHook):
    """
    A base hook for Yandex.Cloud Data Proc.
    :param connection_id: The connection ID to use when fetching connection info.
    :type connection_id: str
    """
    def __init__(self, *args, **kwargs) -> None:
        super().__init__(*args, **kwargs)
        self.cluster_id = None
        self.client = self.sdk.wrappers.Dataproc(
            default_folder_id=self.default_folder_id,
            default_public_ssh_key=self.default_public_ssh_key,
        )