Make the standalone job voting again

We forgot to revert it. This job covers software RAID and manual
cleaning, so it's very important to avoid regressions, even if it costs
us some rechecks from time to time.

Change-Id: I2446afeaca866ffc3131b5e9f266526f35fc5ed7
(cherry picked from commit b921b76167)

zuul.d/project.yaml

@@ -14,13 +14,7 @@
         # wholedisk + partition on tempest
         - ipa-tempest-bios-ipmi-direct-src
         - ipa-tempest-uefi-redfish-vmedia-src
-        # NOTE(TheJulia): The cleaning tests run in standalone job has a
+        - ironic-standalone-ipa-src
-        # high failure rate due to possible race during long running steps
-        # like deployment with raid setup. While we're working on a fix,
-        # we also need to fix IPA and Ironic itself, so this is as a result
-        # temporary.
-        - ironic-standalone-ipa-src:
-            voting: false
         - metalsmith-integration-ipa-src
         - metalsmith-integration-ipa-src-uefi:
             voting: false
@@ -42,6 +36,7 @@
         - ipa-tempest-bios-ipmi-direct-src
         - ipa-tempest-uefi-redfish-vmedia-src
         - metalsmith-integration-ipa-src
+        - ironic-standalone-ipa-src
     post:
       jobs:
         - ironic-python-agent-build-image-tinyipa