Marking ironic-standalone job voting again

The issue with the ironic-standalone job has been fixed.
We can mark the job voting again.

Depends-on: https://review.openstack.org/641376
Change-Id: I859bdb3beb2e0f5f3ea51898c524c979d302a678
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index d37a135..aff85eb 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -6,10 +6,7 @@
     check:
       jobs:
         # NOTE(dtantsur): keep N-3 and older non-voting for these jobs.
-        # marking ironic-standalone non voting until we can run ansible
-        # with python3 interpreter on remote machines
-        - ironic-standalone:
-            voting: false
+        - ironic-standalone
         - ironic-dsvm-standalone-rocky
         - ironic-dsvm-standalone-queens
         - ironic-dsvm-standalone-pike:
@@ -40,9 +37,7 @@
     gate:
       queue: ironic
       jobs:
-        # removing ironic-standalone from gate until we can run ansible
-        # with python3 interpreter on remote machines
-        # - ironic-standalone
+        - ironic-standalone
         - ironic-dsvm-standalone-rocky
         - ironic-dsvm-standalone-queens
         - ironic-tempest-functional-python3