Fix regional resource policy attachment in compute-vm module (#3753)

* fix regional resource policy attachment in compute-vm module

* tfdoc

modules/compute-vm/README.md

@@ -1054,12 +1054,23 @@ module "instance" {
   }
   attached_disks = [
     {
-      name              = "disk-1"
-      size              = 10
-      snapshot_schedule = ["boot"]
+      name = "disk-1"
+      size = 10
+      options = {
+        replica_zone = "${var.region}-c"
+      }
+      snapshot_schedule = ["data"]
     }
   ]
   snapshot_schedules = {
+    boot = {
+      schedule = {
+        hourly = {
+          hours_in_cycle = 1
+          start_time     = "03:00"
+        }
+      }
+    }
     boot = {
       schedule = {
         daily = {

modules/compute-vm/resource-policies.tf

@@ -175,8 +175,8 @@ resource "google_compute_region_disk_resource_policy_attachment" "attached" {
     for attachment in local.disk_regional_schedule_attachments :
     "${attachment.disk_key}-${attachment.snapshot_schedule}" => attachment
   }
-
   project = local.project_id
+  region  = local.region
   name = try(
     google_compute_resource_policy.snapshot[each.value.snapshot_schedule].name,
     each.value.snapshot_schedule