bundles/systemd-networkd: remove usage of systemd-resolved

Something in the combination of arch+zfs+netctl+resolved+ipv6 leads to
hanging dns, which in turn leads to hanging everything.

bundles/arch-with-gui/metadata.py

@@ -80,9 +80,6 @@ defaults = {
             'xdotool': {}, # needed for maim window selection
         },
     },
-    'systemd-networkd': {
-        'enable-resolved': True,
-    },
 }
 
 @metadata_reactor.provides(

bundles/systemd-networkd/items.py

@@ -10,16 +10,12 @@ files = {
 
 svc_systemd = {
     'systemd-networkd': {},
+    'systemd-resolved': {
+        'running': False,
+        'enabled': False,
+    },
 }
 
-if node.metadata.get('systemd-networkd/enable-resolved', False):
-    svc_systemd['systemd-resolved'] = {}
-else:
-    files['/etc/resolv.conf'] = {
-        'content_type': 'mako',
-    }
-
-
 directories = {
     '/etc/systemd/network': {
         'purge': True,
@@ -34,16 +30,16 @@ directories = {
 
 mac_host_prefix = '%04x' % (node.magic_number % 65534)
 generated_mac = f'52:54:00:{mac_host_prefix[0:2]}:{mac_host_prefix[2:4]}:{{}}'
+all_interfaces_use_dhcp = True
 
-# Don't use .get() here. We might end up with a node without a network
-# config!
-for interface, config in node.metadata['interfaces'].items():
+for interface, config in node.metadata.get('interfaces').items():
     if config.get('dhcp', False):
         if 'vlans' in config:
             raise BundleError(f'{node.name} interface {interface} cannot use vlans and dhcp!')
         template = 'template-iface-dhcp.network'
     else:
         template = 'template-iface-nodhcp.network'
+        all_interfaces_use_dhcp = False
 
     if '.' in interface:
         vlan_id = int(interface.split('.')[1])
@@ -94,6 +90,11 @@ for interface, config in node.metadata['interfaces'].items():
             },
         }
 
+if not all_interfaces_use_dhcp:
+    files['/etc/resolv.conf'] = {
+        'content_type': 'mako',
+    }
+
 for bond, config in node.metadata.get('systemd-networkd/bonds', {}).items():
     files[f'/etc/systemd/network/{bond}.netdev'] = {
         'source': 'template-bond.netdev',

nodes/kunsi-t470.py

@@ -80,7 +80,6 @@ nodes['kunsi-t470'] = {
             'install_gui': True,
         },
         'systemd-networkd': {
-            'enable-resolved': True,
             'bridges': {
                 'br0': {
                     'match': {