Make standalone-ipa jobs voting again - minus train

The standalone-ipa job was made non-voting due to
uneven results on various cloud providers.

Since https://review.opendev.org/#/c/757943/ merged,
this review makes the standalone-ipa job voting again
on master/victoria/ussuri.
This test has never passed on train.

Change-Id: I367d9293754a22c8bfe3af30d023f1dd35e87cf3

zuul.d/layout.yaml

@@ -11,6 +11,7 @@
       - tripleo-multinode-branchful
       - tripleo-multinode-container-full-pipeline
       - tripleo-standalone-scenarios-pipeline
+      - tripleo-standalone-multinode-ipa-pipeline
       - tripleo-undercloud-jobs-pipeline
       - tripleo-periodic
     check:

zuul.d/standalone-jobs.yaml

@@ -769,11 +769,20 @@
                 - build
             dependencies:
               - tripleo-ci-centos-8-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
     parent: tripleo-ci-base-standalone-centos-8
-    voting: false
+    voting: true
     nodeset: two-centos-8-nodes
     branches: ^(?!stable/(newton|ocata|pike|queens|stein|train)).*$
     required-projects: