Do not install extra repos with the zuul configure-mirrors role
Do not install extra repos with the zuul configure-mirrors role

These lead to unexpected results when OSA itself is trying to manage
the PowerTools repository.

See https://review.opendev.org/c/zuul/zuul-jobs/+/829028

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-openstack_hosts/+/829021
Change-Id: Ib11b8f6247080b6f43d1b86e83bcb4b02281f1a2

openstack/openstack-ansible,openstack/openstack-ansible,stackforge/os-ansible-deployment,stackforge/os-ansible-deployment