Make use of kubernetes client-go v4

* client-go v4.0.0-beta0
* remove unnecessary methods for tpr object
* rest client: use interface instead of structure pointer
* proper names for constants; some clean up for log messages
* remove teams api client from controller and make it per cluster

pkg/util/constants/kubernetes.go

@@ -4,10 +4,7 @@ import "time"
 
 // General kubernetes-related constants
 const (
-	ListClustersURITemplate     = "/apis/" + TPRVendor + "/" + TPRApiVersion + "/namespaces/%s/" + ResourceName       // Namespace
-	WatchClustersURITemplate    = "/apis/" + TPRVendor + "/" + TPRApiVersion + "/watch/namespaces/%s/" + ResourceName // Namespace
-	K8sVersion                  = "v1"
-	K8sAPIPath                  = "/api"
+	K8sAPIPath                  = "/apis"
 	StatefulsetDeletionInterval = 1 * time.Second
 	StatefulsetDeletionTimeout  = 30 * time.Second
 

pkg/util/constants/roles.go

@@ -2,7 +2,7 @@ package constants
 
 const (
 	PasswordLength         = 64
-	UserSecretTemplate     = "%s.%s.credentials." + TPRName + "." + TPRVendor // Username, ClusterName
+	UserSecretTemplate     = "%s.%s.credentials." + TPRKind + "." + TPRGroup // Username, ClusterName
 	SuperuserKeyName       = "superuser"
 	ReplicationUserKeyName = "replication"
 	RoleFlagSuperuser      = "SUPERUSER"

pkg/util/constants/thirdpartyresource.go

@@ -2,9 +2,10 @@ package constants
 
 // Different properties of the PostgreSQL Third Party Resources
 const (
-	TPRName        = "postgresql"
-	TPRVendor      = "acid.zalan.do"
+	TPRKind        = "postgresql"
+	TPRGroup       = "acid.zalan.do"
 	TPRDescription = "Managed PostgreSQL clusters"
 	TPRApiVersion  = "v1"
-	ResourceName   = TPRName + "s"
+	TPRName        = TPRKind + "." + TPRGroup
+	ResourceName   = TPRKind + "s"
 )