Making WIP patch Active (without owner)

After the resolving the merge conflict, the following IBM Cinder driver patch is now in ‘Work in Progress’ state. We want to now make it Active, but the owner of the patch is no longer working with the organisation. Thus, the Gerrit UI is not showing option to publish. How to make this patch Active again? The patch was reviewed and had multiple +1 votes earlier. Patch: https://review.opendev.org/c/openstack/cinder/+/879839