metropolis/test/launch: enable VNC for launch-cluster

Change-Id: Ia32860b98ed7d4aec6aa7f6a2fb22813edea0e48
Reviewed-on: https://review.monogon.dev/c/monogon/+/4436
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/test/launch/cluster.go b/metropolis/test/launch/cluster.go
index af15564..7f64427 100644
--- a/metropolis/test/launch/cluster.go
+++ b/metropolis/test/launch/cluster.go
@@ -791,6 +791,7 @@
 		nodeOpts[i] = opts.Node
 		nodeOpts[i].Name = fmt.Sprintf("node%d", i)
 		nodeOpts[i].SerialPort = newPrefixedStdio(i)
+		nodeOpts[i].RunVNC = true
 	}
 	nodeOpts[0].NodeParameters = &apb.NodeParameters{
 		Cluster: &apb.NodeParameters_ClusterBootstrap_{