Values:
STATE_UNSPECIFIED (0):
The Restore resource is in the process of
being created.
CREATING (1):
The Restore resource has been created and the
associated RestoreJob Kubernetes resource has
been injected into target cluster.
IN_PROGRESS (2):
The gkebackup agent in the cluster has begun
executing the restore operation.
SUCCEEDED (3):
The restore operation has completed
successfully. Restored workloads may not yet be
operational.
FAILED (4):
The restore operation has failed.
DELETING (5):
This Restore resource is in the process of
being deleted.
