Revert "Revert "Make standalone-ipa job non-voting during debug""

This reverts commit 70a392b842.

Reason for revert: We merged the NTP validation again and need to
troubleshoot why it's failing in some clouds.

Change-Id: I74347477079a297bee09c754f9ed633c6ec2628e
Related-Bug: #1957083

zuul.d/standalone-jobs.yaml

@@ -881,6 +881,7 @@
         - tripleo-ci-centos-8-content-provider
         - tripleo-ci-centos-9-content-provider
         - tripleo-ci-centos-8-standalone-on-multinode-ipa:
+            voting: false
             files: &tls_ipa_files
               # tripleo-quickstart-extras
               - ^roles/.*multinode-ipa.*$
@@ -921,15 +922,6 @@
             vars: *ipa_consumer_vars
             dependencies:
               - tripleo-ci-centos-9-content-provider
-    gate:
-      queue: tripleo
-      jobs:
-        - tripleo-ci-centos-8-content-provider
-        - tripleo-ci-centos-8-standalone-on-multinode-ipa:
-            files: *tls_ipa_files
-            vars: *ipa_consumer_vars
-            dependencies:
-              - tripleo-ci-centos-8-content-provider
 
 - job:
     name: tripleo-ci-centos-8-standalone-on-multinode-ipa