zuul: Move live migration jobs back to voting

With the resolution of bug #1945983 within devstack we can now move our
live migration jobs back to voting.

Related-Bug: #1945983
Closes-Bug: #1912310
Depends-On: https://review.opendev.org/c/openstack/devstack/+/812391
Depends-On: https://review.opendev.org/c/openstack/devstack/+/812925
Change-Id: I25177554802579952510c73985287fd76681012c

.zuul.yaml

@@ -120,9 +120,6 @@
               # NOTE(lyarwood): Skip until bug #1931702 is resolved.
               block_migrate_cinder_iscsi: false
     post-run: playbooks/nova-live-migration/post-run.yaml
-    # NOTE(lyarwood): This job is now non-voting until bug #1912310 is resolved
-    # within libvirt/QEMU.
-    voting: false
 
 - job:
     name: nova-live-migration-ceph
@@ -142,9 +139,6 @@
               block_migration_for_live_migration: false
               block_migrate_cinder_iscsi: false
     post-run: playbooks/nova-live-migration/post-run.yaml
-    # NOTE(lyarwood): This job is now non-voting until bug #1912310 is resolved
-    # within libvirt/QEMU.
-    voting: false
 
 - job:
     name: nova-lvm