unijobs epsilon eta and zeta use rootwrap_config = /etc/glance/rootwrap.conf but should not

As per akekane@redhat.com it's unnecessary and we're going to remove it from our docs as per OSPRH-17705

[1] https://github.com/openstack-k8s-operators/architecture/blob/main/examples/dt/uni05epsilon/service-values.yaml#L103
[2] https://github.com/openstack-k8s-operators/architecture/blob/main/examples/dt/uni07eta/control-plane/service-values.yaml#L46
[3] https://github.com/openstack-k8s-operators/architecture/blob/main/examples/dt/uni06zeta/control-plane/service-values.yaml#L50