[nova] Policy: Remove admin-actions{,:reset_network}
[nova] Policy: Remove admin-actions{,:reset_network}

os-admin-actions was removed in 16 (Pike) and the endpoint protected
by os-admin-actions:reset_network's was Xen-API-only and removed in
nova:68bc87876f6479fe49b6a13a4c032eefe0ff016f for 23 (Wallaby).

sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts