chore(metallb): add lb ip on service as annotation

library/common-test/tests/service/load_balancer_test.yaml

@@ -142,3 +142,8 @@ tests:
               app.kubernetes.io/instance: test-release-name
               app.kubernetes.io/name: common-test
               pod.name: my-workload
+      - documentIndex: *serviceDoc
+        isSubset:
+          path: metadata.annotations
+          content:
+            metallb.universe.tf/loadBalancerIPs: "10.100.200.45"

library/common/templates/lib/service/_additionalAnnotations.tpl

@@ -21,6 +21,9 @@ annotations: The annotations variable reference, to append the MetalLB annotatio
   {{- if (hasKey $rootCtx.Values.global "metallb") -}}
     {{- if $rootCtx.Values.global.metallb.addServiceAnnotations -}}
       {{- $_ := set $annotations "metallb.universe.tf/allow-shared-ip" $sharedKey -}}
+      {{- if $objectData.loadBalancerIP -}}
+        {{- $_ := set $annotations "metallb.universe.tf/loadBalancerIPs" (tpl $objectData.loadBalancerIP $rootCtx) -}}
+      {{- end -}}
     {{- end -}}
   {{- end -}}
 {{- end -}}