feat!: Drop Metallb in favor of Cilium L2Announcements (#821)

tmpl/ansible/supplemental.yml

@@ -1,5 +1,5 @@
 ---
 timezone: "${BOOTSTRAP_TIMEZONE}"
-kubevip_address: "${BOOTSTRAP_KUBE_VIP_ADDR}"
+kube_vip_addr: "${BOOTSTRAP_KUBE_VIP_ADDR}"
 cluster_cidr: "${BOOTSTRAP_CLUSTER_CIDR}"
 service_cidr: "${BOOTSTRAP_SERVICE_CIDR}"