common: Force netmask to /32

For some reason orion has a netmask of /8 which doesn't work in
hetzner's network since all traffic to other machines must pass through
a switch. Fix this by forcing a /32 netmask.

This change also requires us to set the gateway via the Peer option
because it would otherwise not be reachable.

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/common/templates/10-static-ethernet.network.j2

@@ -5,7 +5,12 @@ Name=e*
 DNS=213.133.98.98
 DNS=213.133.99.99
 DNS=213.133.100.100
-Address={{ ipv4_address }}
-Address={{ ipv6_address }}
 Gateway={{ ipv4_gateway }}
 Gateway={{ ipv6_gateway }}
+
+[Address]
+Address={{ ipv4_address }}/32
+Peer={{ ipv4_gateway }}/32
+
+[Address]
+Address={{ ipv6_address }}