Allow upgrades on azure without Terraform changes on LBs created from within Kubernetes (#3257)

* k8s: use separate lb for K8s services on azure

* terraform: introduce local revision variable and data resource

* terraform: azure: dont expose full nodeport range

* docs: add Azure load balancer migration

terraform/infrastructure/gcp/main.tf

@@ -60,6 +60,13 @@ locals {
   ]
   in_cluster_endpoint     = var.internal_load_balancer ? google_compute_address.loadbalancer_ip_internal[0].address : google_compute_global_address.loadbalancer_ip[0].address
   out_of_cluster_endpoint = var.debug && var.internal_load_balancer ? module.jump_host[0].ip : local.in_cluster_endpoint
+  revision                = 1
+}
+
+# A way to force replacement of resources if the provider does not want to replace them
+# see: https://developer.hashicorp.com/terraform/language/resources/terraform-data#example-usage-data-for-replace_triggered_by
+resource "terraform_data" "replacement" {
+  input = local.revision
 }
 
 resource "random_id" "uid" {