Added short sleep to google_chronicle_rule test_check_destroy (GoogleCloudPlatform#17505)

Author: melinath

mmv1/products/chronicle/Rule.yaml

@@ -54,6 +54,7 @@ examples:
 
 custom_code:
   pre_delete: 'templates/terraform/pre_delete/chronicle_rule.go.tmpl'
+  test_check_destroy: 'templates/terraform/custom_check_destroy/chronicle_rule.go.tmpl'
 
 virtual_fields:
   - name: 'deletion_policy'

mmv1/templates/terraform/custom_check_destroy/chronicle_rule.go.tmpl

@@ -0,0 +1,25 @@
+// Delete is eventually-consistent; wait for a moment.
+time.Sleep(10*time.Second)
+
+config := acctest.GoogleProviderConfig(t)
+url, err := tpgresource.ReplaceVarsForTest(config, rs, fmt.Sprintf("%s%s", transport_tpg.BaseUrl(chronicle.Product, config), "projects/{{"{{"}}project{{"}}"}}/locations/{{"{{"}}location{{"}}"}}/instances/{{"{{"}}instance{{"}}"}}/rules/{{"{{"}}rule_id{{"}}"}}"))
+if err != nil {
+	return err
+}
+
+billingProject := ""
+
+if config.BillingProject != "" {
+	billingProject = config.BillingProject
+}
+
+_, err = transport_tpg.SendRequest(transport_tpg.SendRequestOptions{
+	Config:    config,
+	Method:    "GET",
+	Project:   billingProject,
+	RawURL:    url,
+	UserAgent: config.UserAgent,
+})
+if err == nil {
+	return fmt.Errorf("ChronicleRule still exists at %s", url)
+}