**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
tests/providers/google/cloud/operators/test_dataproc.py
internal_ip_only=True,
            tags=["tags"],
            storage_bucket="storage_bucket",
            init_actions_uris=["init_actions_uris"],
            init_action_timeout="10m",
            metadata={"metadata": "data"},
            custom_image="custom_image",
            custom_image_project_id="custom_image_project_id",
            autoscaling_policy="autoscaling_policy",
            properties={"properties": "data"},
            optional_components=["optional_components"],
            num_masters=2,
            master_machine_type="master_machine_type",
            master_disk_type="master_disk_type",
            master_disk_size=128,
            worker_machine_type="worker_machine_type",
            worker_disk_type="worker_disk_type",
            worker_disk_size=256,
            num_preemptible_workers=4,
            region="region",
            service_account="service_account",
            service_account_scopes=["service_account_scopes"],
            idle_delete_ttl=60,
            auto_delete_time=datetime(2019, 9, 12),
            auto_delete_ttl=250,
            customer_managed_key="customer_managed_key",
        )
        cluster = generator.make()
        assert CONFIG == cluster
class TestDataprocClusterCreateOperator(unittest.TestCase):