Add oke and nlb to managed cluster

oci-managed/nlb/data.tf

@@ -0,0 +1,8 @@
+data "oci_containerengine_cluster_kube_config" "cluster_kube_config" {
+    #Required
+    cluster_id = var.cluster_ocid
+
+    #Optional
+    endpoint = var.cluster_public_endpoint
+    token_version = "2.0.0"
+}