docs: Change Cloud Scheduler region from us-central1 to us-east1 (#948)

* docs: Change Cloud Scheduler region from us-central1 to us-east1

Per b/507114306

* docs: Add wait time for Cloud Scheduler job completion

Added a sleep resource to wait for the Cloud Scheduler job to complete before proceeding

Author: camiekim

cloud_scheduler/basic/main.tf

@@ -53,11 +53,28 @@ resource "google_cloud_scheduler_job" "default" {
   name        = "test-job"
   description = "test job"
   schedule    = "30 16 * * 7"
-  region      = "us-central1"
+  region      = "us-east1"
 
   pubsub_target {
     topic_name = google_pubsub_topic.default.id
     data       = base64encode("Hello world!")
   }
 }
 # [END cloudscheduler_terraform_basic_job]
+
+# Cloud Scheduler invokes the job, but then the job runs asynchronously
+# We cannot delete the running job
+# Wait 5 minutes before completing the 'apply' step
+
+resource "time_sleep" "wait_for_scheduler_api" {
+  create_duration = "300s"
+
+  depends_on = [
+    google_cloud_scheduler_job.default,
+    google_pubsub_subscription.default,
+  ]
+}
+
+resource "null_resource" "test_sync_anchor" {
+  depends_on = [time_sleep.wait_for_scheduler_api]
+}