Make sqlalchemy-2x job voting again

... because the new oslo.utils version is now used in CI.

Depends-on: https://review.opendev.org/c/openstack/requirements/+/900517
Related-Bug: #2042886
Change-Id: I855103c5ee17db3c690397e3db78139f3264735c

zuul.d/ironic-jobs.yaml

@@ -697,8 +697,6 @@
       tox_envlist: py3
     # The job only tests the latest and shouldn't be run on the stable branches
     branches: ^master$
-    # TODO(tkajinam): Make this voting once oslo.utils is bumped to 6.3.0
-    voting: false
     required-projects:
       - name: github.com/sqlalchemy/sqlalchemy
         override-checkout: main