Deconsolidate network setup for proxmox and debian roles

They are just different enough to be annoying.

templates/10-network.rules.j2

@@ -0,0 +1,3 @@
+{% for iface in hostvars[inventory_hostname].interfaces | selectattr('mac_address') %}
+SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="{{ iface.mac_address|lower }}", NAME="{{ iface.name }}"
+{% endfor %}