Reconcile kube-router only if cfg changed

Commit 65b05d5 added a check so that kube-router was only reconciled
if the config has changed, however, the previous configuration wasn't
stored at all.

Signed-off-by: Juan Luis de Sousa-Valadas Castaño <jvaladas@mirantis.com>

pkg/component/controller/kuberouter.go

@@ -115,6 +115,7 @@ func (k *KubeRouter) Reconcile(_ context.Context, clusterConfig *v1beta1.Cluster
 	if err != nil {
 		return fmt.Errorf("error writing kube-router manifests, will NOT retry: %w", err)
 	}
+	k.previousConfig = cfg
 	return nil
 }