feat(examples/templates/gcp-windows): add GCP region module (#15552)

examples/templates/gcp-windows/main.tf

@@ -9,64 +9,37 @@ terraform {
   }
 }
 
-provider "coder" {
-}
+provider "coder" {}
 
 variable "project_id" {
   description = "Which Google Compute Project should your workspace live in?"
 }
 
-data "coder_parameter" "zone" {
-  name         = "zone"
-  display_name = "Zone"
-  description  = "Which zone should your workspace live in?"
-  type         = "string"
-  default      = "us-central1-a"
-  icon         = "/emojis/1f30e.png"
-  mutable      = false
-  option {
-    name  = "North America (Northeast)"
-    value = "northamerica-northeast1-a"
-    icon  = "/emojis/1f1fa-1f1f8.png"
-  }
-  option {
-    name  = "North America (Central)"
-    value = "us-central1-a"
-    icon  = "/emojis/1f1fa-1f1f8.png"
-  }
-  option {
-    name  = "North America (West)"
-    value = "us-west2-c"
-    icon  = "/emojis/1f1fa-1f1f8.png"
-  }
-  option {
-    name  = "Europe (West)"
-    value = "europe-west4-b"
-    icon  = "/emojis/1f1ea-1f1fa.png"
-  }
-  option {
-    name  = "South America (East)"
-    value = "southamerica-east1-a"
-    icon  = "/emojis/1f1e7-1f1f7.png"
-  }
+# See https://registry.coder.com/modules/gcp-region
+module "gcp_region" {
+  source = "registry.coder.com/modules/gcp-region/coder"
+
+  # This ensures that the latest version of the module gets downloaded, you can also pin the module version to prevent breaking changes in production.
+  version = ">= 1.0.0"
+
+  regions = ["us", "europe"]
+  default = "us-central1-a"
 }
 
 provider "google" {
-  zone    = data.coder_parameter.zone.value
+  zone    = module.gcp_region.value
   project = var.project_id
 }
 
-data "coder_workspace" "me" {
-}
+data "coder_workspace" "me" {}
 data "coder_workspace_owner" "me" {}
 
-data "google_compute_default_service_account" "default" {
-}
+data "google_compute_default_service_account" "default" {}
 
 resource "google_compute_disk" "root" {
   name  = "coder-${data.coder_workspace.me.id}-root"
   type  = "pd-ssd"
-  zone  = data.coder_parameter.zone.value
+  zone  = module.gcp_region.value
   image = "projects/windows-cloud/global/images/windows-server-2022-dc-core-v20220215"
   lifecycle {
     ignore_changes = [name, image]
@@ -77,11 +50,10 @@ resource "coder_agent" "main" {
   auth = "google-instance-identity"
   arch = "amd64"
   os   = "windows"
-
 }
 
 resource "google_compute_instance" "dev" {
-  zone         = data.coder_parameter.zone.value
+  zone         = module.gcp_region.value
   count        = data.coder_workspace.me.start_count
   name         = "coder-${lower(data.coder_workspace_owner.me.name)}-${lower(data.coder_workspace.me.name)}"
   machine_type = "e2-medium"