topology controller should takeover ownership for fields at clusterCl…

…ass.spec.topology

internal/controllers/topology/cluster/reconcile_state.go

@@ -441,6 +441,7 @@ func (r *Reconciler) reconcileCluster(ctx context.Context, s *scope.Scope) error
 	// Check differences between current and desired state, and eventually patch the current object.
 	patchHelper, err := r.patchHelperFactory(ctx, s.Current.Cluster, s.Desired.Cluster, structuredmerge.IgnorePaths{
 		{"spec", "controlPlaneEndpoint"}, // this is a well known field that is managed by the Cluster controller, topology should not express opinions on it.
+		{"spec", "topology"},             // this is a well known part read as input for the topology controller, topology should not try to patch variables on it.
 	})
 	if err != nil {
 		return errors.Wrapf(err, "failed to create patch helper for %s", tlog.KObj{Obj: s.Current.Cluster})