Add accessibleNamespaces to KubernetesClusterModel (#3487)

Fixes #3485

Signed-off-by: Jan Jansen <jan.jansen@gdata.de>

src/common/catalog-entities/kubernetes-cluster.ts

@@ -43,6 +43,7 @@ export interface KubernetesClusterPrometheusMetrics {
 export interface KubernetesClusterSpec extends CatalogEntitySpec {
   kubeconfigPath: string;
   kubeconfigContext: string;
+  accessibleNamespaces?: string[];
   metrics?: {
     source: string;
     prometheus?: KubernetesClusterPrometheusMetrics;