Promotes a read replica DB cluster to a standalone DB cluster.
See https://www.paws-r-sdk.com/docs/rds_promote_read_replica_db_cluster/ for full documentation.
rds_promote_read_replica_db_cluster(DBClusterIdentifier)
[required] The identifier of the DB cluster read replica to promote. This parameter isn't case-sensitive.
Constraints:
Must match the identifier of an existing DB cluster read replica.
Example: my-cluster-replica1