treewide: integrate new DNS server

This integrates the new DNS server into the network service, replacing 
CoreDNS.

Change-Id: I1d2e0fd3315dc2c602a8f805ed701633799e9986
Reviewed-on: https://review.monogon.dev/c/monogon/+/3260
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/cloud/agent/agent.go b/cloud/agent/agent.go
index e014ac0..4430424 100644
--- a/cloud/agent/agent.go
+++ b/cloud/agent/agent.go
@@ -73,7 +73,7 @@
 	devmgrSvc := devmgr.New()
 	supervisor.Run(ctx, "devmgr", devmgrSvc.Run)
 
-	networkSvc := network.New(agentInit.NetworkConfig)
+	networkSvc := network.New(agentInit.NetworkConfig, nil)
 	networkSvc.DHCPVendorClassID = "dev.monogon.cloud.agent.v1"
 	supervisor.Run(ctx, "networking", networkSvc.Run)
 	l.Info("Started networking")