This goes for the normal firewall, the egress firewall and the network
ACL.
USE WITH CAUTION! When setting `managed = true` in your config, it
means it will delete all firewall rules that are not in your config, so
unknown to TF.
Also adding the new `cloudstack_egress_firewall` resource with this
commit and updating go-cloudstack to the latest API version (v4.4)