Output all neg ids in app lbs (#1879)

Co-authored-by: Ludovico Magnocavallo <ludomagno@google.com>

modules/net-lb-app-ext/outputs.tf

@@ -1,5 +1,5 @@
 /**
- * Copyright 2022 Google LLC
+ * Copyright 2023 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,6 +38,13 @@ output "forwarding_rule" {
   value       = google_compute_global_forwarding_rule.default
 }
 
+output "global_neg_ids" {
+  description = "Autogenerated global network endpoint group ids."
+  value = {
+    for k, v in google_compute_global_network_endpoint_group.default : k => v.id
+  }
+}
+
 output "group_ids" {
   description = "Autogenerated instance group ids."
   value = {
@@ -63,3 +70,17 @@ output "neg_ids" {
     for k, v in google_compute_network_endpoint_group.default : k => v.id
   }
 }
+
+output "psc_neg_ids" {
+  description = "Autogenerated PSC network endpoint group ids."
+  value = {
+    for k, v in google_compute_region_network_endpoint_group.psc : k => v.id
+  }
+}
+
+output "serverless_neg_ids" {
+  description = "Autogenerated serverless network endpoint group ids."
+  value = {
+    for k, v in google_compute_region_network_endpoint_group.serverless : k => v.id
+  }
+}