feat: allow flux to take over cilium (#755)

tmpl/kubernetes/flux/cluster-settings.yaml

@@ -9,3 +9,6 @@ data:
   METALLB_LB_RANGE: "${BOOTSTRAP_METALLB_LB_RANGE}"
   METALLB_K8S_GATEWAY_ADDR: "${BOOTSTRAP_METALLB_K8S_GATEWAY_ADDR}"
   METALLB_INGRESS_ADDR: "${BOOTSTRAP_METALLB_INGRESS_ADDR}"
+  KUBE_VIP_ADDR: "${BOOTSTRAP_KUBE_VIP_ADDR}"
+  CLUSTER_CIDR: "${BOOTSTRAP_CLUSTER_CIDR}"
+  SERVICE_CIDR: "${BOOTSTRAP_SERVICE_CIDR}"