**Description**
Currently, we can only pass custom Image name to  **DataprocClusterCreateOperator(),**
as the custom image expires after 60 days, we either need to update the image or we need to pass the expiration token.

Functionality is already available in **gcloud** and **REST**.

`gcloud dataproc clusters test_cluster ......
--image projects/<custom_image_project_id>/global/images/family/<family_name>
.......
`


**Use case / motivation**
The user should be able to pass either Custom Image or Custom Image family name,
so we don't have to update the image up on expiration or use expiration token.


**Are you willing to submit a PR?**
Yes

**Related Issues**
None
airflow/providers/google/cloud/operators/dataproc.py
"""
    Scale, up or down, a cluster on Google Cloud Dataproc.
    The operator will wait until the cluster is re-scaled.
    **Example**: ::
        t1 = DataprocClusterScaleOperator(
                task_id='dataproc_scale',
                project_id='my-project',
                cluster_name='cluster-1',
                num_workers=10,
                num_preemptible_workers=10,
                graceful_decommission_timeout='1h',
                dag=dag)
    .. seealso::
        For more detail on about scaling clusters have a look at the reference: