Fix OVN condition flapping during minor updates

During minor updates, reconcileOVNControllers was called on every
reconcile throughout all update phases, causing two issues:

1. OVNReadyCondition flapping: Since InitConditions() resets all
   conditions to Unknown on each reconcile, calling
   reconcileOVNControllers during later phases (RabbitMQ, Galera, etc.)
   could transiently flip OVNReadyCondition to False, blocking the
   OpenStackVersion controller from maintaining MinorUpdateOVNControlplane
   as True.

2. Metrics DaemonSet unnecessary restarts: reconcileOVNControllers
   passed an empty string for the metrics cert name, clearing the
   MetricsTLS fields on the OVNController CR. This changed the metrics
   config hash, causing two spurious DaemonSet rollouts — once when
   MetricsTLS was cleared during the update, and again when the normal
   reconcile path restored it after the update completed.

Fix both by:
- Skipping reconcileOVNControllers after the OVN controlplane phase
  completes, directly marking OVNReadyCondition True instead (needed
  because InitConditions() resets conditions each reconcile).
- Passing the correct metrics cert name via EnsureOVNMetricsCert so
  MetricsTLS stays consistent when reconcileOVNControllers does run.

There was another issue in ovn-operator for pre mature readiness, that is
being fixed as part of openstack-k8s-operators/ovn-operator#587

Related-Issue: https://redhat.atlassian.net/browse/OSPRH-31318
Assisted-By: Claude
Signed-off-by: Yatin Karel <ykarel@redhat.com>

Author: karelyatin

internal/controller/core/openstackcontrolplane_controller.go

@@ -315,17 +315,23 @@ func (r *OpenStackControlPlaneReconciler) Reconcile(ctx context.Context, req ctr
 	}
 
 	// OVN
-	Log.Info("Minor update OVN on the ControlPlane")
-	ctrlResult, err = r.reconcileOVNControllers(ctx, instance, version, helper)
-	if err != nil {
-		return ctrl.Result{}, err
-	} else if (ctrlResult != ctrl.Result{}) {
-		return ctrlResult, nil
-	}
-	instance.Status.DeployedOVNVersion = &version.Spec.TargetVersion
+	// Once the OVN controlplane phase is complete, skip reconcileOVNControllers to prevent
+	// transient OVN readiness changes from flapping OVNReadyCondition during
+	// later phases. We still need to mark OVNReadyCondition True because
+	// InitConditions() resets all conditions to Unknown on each reconcile.
 	if !version.Status.Conditions.IsTrue(corev1beta1.OpenStackVersionMinorUpdateOVNControlplane) {
+		Log.Info("Minor update OVN on the ControlPlane")
+		ctrlResult, err = r.reconcileOVNControllers(ctx, instance, version, helper)
+		if err != nil {
+			return ctrl.Result{}, err
+		} else if (ctrlResult != ctrl.Result{}) {
+			return ctrlResult, nil
+		}
+		instance.Status.DeployedOVNVersion = &version.Spec.TargetVersion
+		// Wait for the OpenStackVersion controller to acknowledge OVN controlplane update
 		return ctrlResult, nil
 	}
+	instance.Status.Conditions.MarkTrue(corev1beta1.OpenStackControlPlaneOVNReadyCondition, corev1beta1.OpenStackControlPlaneOVNReadyMessage)
 
 	// only if OVN dataplane is updated
 	if version.Status.Conditions.IsTrue(corev1beta1.OpenStackVersionMinorUpdateOVNDataplane) {
@@ -402,7 +408,15 @@ func (r *OpenStackControlPlaneReconciler) Reconcile(ctx context.Context, req ctr
 }
 
 func (r *OpenStackControlPlaneReconciler) reconcileOVNControllers(ctx context.Context, instance *corev1beta1.OpenStackControlPlane, version *corev1beta1.OpenStackVersion, helper *common_helper.Helper) (ctrl.Result, error) {
-	OVNControllerReady, OVNControllerConditions, err := openstack.ReconcileOVNController(ctx, instance, version, helper, "")
+	var ovnMetricsCertName string
+	if instance.Spec.Ovn.Enabled && instance.Spec.TLS.PodLevel.Enabled {
+		var err error
+		ovnMetricsCertName, err = openstack.EnsureOVNMetricsCert(ctx, instance, helper)
+		if err != nil {
+			return ctrl.Result{}, err
+		}
+	}
+	OVNControllerReady, OVNControllerConditions, err := openstack.ReconcileOVNController(ctx, instance, version, helper, ovnMetricsCertName)
 	if err != nil {
 		return ctrl.Result{}, err
 	} else if !OVNControllerReady {