Secure RBAC roles

Patches topic: https://review.opendev.org/q/topic:%2522secure-rbac%2522+(status:open+OR+status:merged)+project:openstack/neutron

https://review.opendev.org/c/openstack/neutron/+/764436

https://review.opendev.org/c/openstack/neutron/+/764437

https://review.opendev.org/c/openstack/neutron/+/764447

Work items:
Propose new roles in neutron: DONE
Migrate address_scope to new roles: DONE
Migrate agent to new roles: DONE
Migrate auto_allocated_topology to new roles: DONE
Migrate availability zone to new roles: DONE
Migrate flavor to new roles: DONE
Migrate floating ip pools to new roles: DONE
Migrate fip port forwarding to new roles: DONE
Migrate floating ip to new roles: DONE
Migrate l3_conntrack_helper to new roles: DONE
Migrate logging to new roles: DONE
Migrate metering to new roles: DONE
Migrate network_ip_availability to new roles: DONE
Migrate network to new roles: DONE
Migrate network_segment_range to new roles: DONE
Migrate port to new roles: DONE
Migrate qos to new roles: DONE
Migrate quotas to new roles: DONE
Migrate rbac to new roles: DONE
Migrate router to new roles: DONE
Migrate security groups to new roles: DONE
Migrate segments to new roles: DONE
Migrate service_type to new roles: DONE
Migrate subnetpool to new roles: DONE
Migrate subnet to new roles: DONE
Migrate trunk to new roles: DONE
Make neutron aware of the new roles in policy module: INPROGRESS
Testing of the new roles: TODO