* 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
Currently there are ru-central1-a, ru-central1-b and ru-central1-c.
    :type zone: str
    :param service_account_id: Service account id for the cluster.
                               Service account can be created inside the folder.
    :type service_account_id: Optional[str]
    :param masternode_resource_preset: Resources preset (CPU+RAM configuration)
                                       for the master node of the cluster.
    :type masternode_resource_preset: str
    :param masternode_disk_size: Masternode storage size in GiB.
    :type masternode_disk_size: int
    :param masternode_disk_type: Masternode storage type. Possible options: network-ssd, network-hdd.
    :type masternode_disk_type: str
    :param datanode_resource_preset: Resources preset (CPU+RAM configuration)
                                     for the data nodes of the cluster.
    :type datanode_resource_preset: str
    :param datanode_disk_size: Datanodes storage size in GiB.
    :type datanode_disk_size: int
    :param datanode_disk_type: Datanodes storage type. Possible options: network-ssd, network-hdd.
    :type datanode_disk_type: str
    :param computenode_resource_preset: Resources preset (CPU+RAM configuration)
                                        for the compute nodes of the cluster.
    :type computenode_resource_preset: str
    :param computenode_disk_size: Computenodes storage size in GiB.
    :type computenode_disk_size: int
    :param computenode_disk_type: Computenodes storage type. Possible options: network-ssd, network-hdd.
    :type computenode_disk_type: str
    :param connection_id: ID of the Yandex.Cloud Airflow connection.
    :type connection_id: Optional[str]
    """
    def __init__(