fix: Update metadata to add connection for regional-lb (#489)

Co-authored-by: abhishek kumar tiwari <[email protected]>

Author: amrkk123

modules/instance_template/metadata.yaml

@@ -307,6 +307,11 @@ spec:
               version: ">= 0.1.0"
             spec:
               outputExpr: "{\"BIGTABLE_INSTANCE_ID\" : instance_id, \"BIGTABLE_TABLE_IDS\" : table_ids}"
+          - source:
+              source: github.com/GoogleCloudPlatform/terraform-google-regional-lb-http//modules/frontend
+              version: ">= 0.4.0"
+            spec:
+              outputExpr: "{\"IP_ADDRESS_HTTP\": ip_address_http, \"IP_ADDRESS_HTTPS\": ip_address_https}"
       - name: service_account
         description: Service account to attach to the instance. See https://www.terraform.io/docs/providers/google/r/compute_instance_template#service_account.
         varType: |-