fix(system-upgrade): Disable host-network usage for kured

I'm not really sure why they decided to put kured into the host network, there
is no need for that. Therefore this patch disables the hostnetwork

infrastructure/system-upgrades/kured.yaml

@@ -44,6 +44,7 @@ data:
       preferNoScheduleTaint: weave.works/kured-node-reboot
       blockingPodSelector:
         - upgrade.cattle.io/plan
+    hostNetwork: false
     metrics:
       create: true
     resources: