hosts/astatine,hosts/beryllium,hosts/tungsten: Migrate to

systemd-networkd

Policy routing clashed with the fallback dhcp on any interface module
for some unknown reason, therefore wg-clerie is disabled on all of these
devices

profiles/network-fallback-dhcp/default.nix

@@ -0,0 +1,22 @@
+{ config, lib, ... }:
+
+with lib;
+
+{
+
+  options.profiles.clerie.network-fallback-dhcp = {
+    enable = mkEnableOption "Profile for systemd-network falling back to DHCP on all interfaces";
+  };
+
+  config = mkIf config.profiles.clerie.network-fallback-dhcp.enable {
+
+    systemd.network.wait-online.anyInterface = true;
+
+    systemd.network.networks."90-lan-dhcp" = {
+      matchConfig.Type = "ether";
+      networkConfig.DHCP = true;
+      linkConfig.RequiredForOnline = "routable";
+    };
+
+  };
+}