fix(load-balancer): don't print entire node object when adding robot target (#904)

When adding new targets to a loadbalancer,
hcloud-cloud-controller-manager usually prints something along the lines

    add target op="hcops/LoadBalancerOps.ReconcileHCLBTargets" service="<service_name>" targetName="<node_name>"

When adding robot nodes, it instead prints 

  add target op="hcops/LoadBalancerOps.ReconcileHCLBTargets" service="<service_name>"
targetName="<the entire serialized node object>"

which is quite obviously wrong. This PR fixes so that it is only the name that is
printed.

I also changed to log message to communicate that this it is a robot
node that is being added.

Author: isakstenstrom

internal/hcops/load_balancer.go

@@ -818,7 +818,7 @@ func (l *LoadBalancerOps) ReconcileHCLBTargets(
 				continue
 			}
 
-			klog.InfoS("add target", "op", op, "service", svc.ObjectMeta.Name, "targetName", node, "ip", ip)
+			klog.InfoS("add target (robot node)", "op", op, "service", svc.ObjectMeta.Name, "targetName", node.Name, "ip", ip)
 			opts := hcloud.LoadBalancerAddIPTargetOpts{
 				IP: net.ParseIP(ip),
 			}