feat: continue incus implementation (#245)

- migrate to systemd-networkd
- setup dummy, bridge and static/ethernet interfaces
- manage sshd.service droping to start ssh after networking is online
- enable ip forewarding
- add fastpool/data/incus dataset
- enable ospf and frr
- add loopback0 as ssh listenaddress
- add loopback1/2 for ceph cluster/public traffic

Reviewed-on: https://git.query.consul/unkinben/puppet-prod/pulls/245

modules/networking/templates/networkd-link.erb

@@ -0,0 +1,8 @@
+[Match]
+MACAddress=<%= @mac %>
+
+[Link]
+MTUBytes=<%= @mtu %>
+<% if @txqueuelen and @txqueuelen >= 1 -%>
+TransmitQueueLength=<%= @txqueuelen %>
+<% end -%>