Add oke and nlb to managed cluster

oci-managed/oke/cluster.tf

@@ -0,0 +1,23 @@
+resource "oci_containerengine_cluster" "k8s_cluster" {
+  compartment_id     = var.compartment_ocid
+  kubernetes_version = var.kubernetes_version
+  name               = "${var.cluster_name}-${var.environment}-cluster"
+  vcn_id             = var.vcn_id
+
+  endpoint_config {
+    is_public_ip_enabled = true
+    subnet_id            = var.vcn_public_subnet_id
+  }
+
+  options {
+    add_ons {
+      is_kubernetes_dashboard_enabled = var.kubernetes_dashboard_enabled
+      is_tiller_enabled               = var.tiller_enabled
+    }
+    kubernetes_network_config {
+      pods_cidr     = "10.244.0.0/16"
+      services_cidr = "10.96.0.0/16"
+    }
+    service_lb_subnet_ids = [var.vcn_public_subnet_id]
+  }
+}