Make teamId in cluster name optional (#2001)

* making teamId in clustername optional
* move teamId check to addCluster function

docs/reference/cluster_manifest.md

@@ -53,8 +53,7 @@ Those parameters are grouped under the `metadata` top-level key.
 These parameters are grouped directly under  the `spec` key in the manifest.
 
 * **teamId**
-  name of the team the cluster belongs to. Changing it after the cluster
-  creation is not supported. Required field.
+  name of the team the cluster belongs to. Required field.
 
 * **numberOfInstances**
   total number of  instances for a given cluster. The operator parameters

docs/reference/operator_parameters.md

@@ -92,6 +92,11 @@ Those are top-level keys, containing both leaf keys and groups.
 * **enable_spilo_wal_path_compat**
   enables backwards compatible path between Spilo 12 and Spilo 13+ images. The default is `false`.
 
+* **enable_team_id_clustername_prefix**
+  To lower the risk of name clashes between clusters of different teams you
+  can turn on this flag and the operator will sync only clusters where the
+  name starts with the `teamId` (from `spec`) plus `-`. Default is `false`.
+
 * **etcd_host**
   Etcd connection string for Patroni defined as `host:port`. Not required when
   Patroni native Kubernetes support is used. The default is empty (use