desiredIstio: Delete trustBundleName

Change desiredIstio not to set trustBundleName, which requires OSSM 3.1.

Trying to set trustBundleName caused the operator to log the following error and reconcile repeatedly:

    unknown field "spec.values.global.trustBundleName"

Once we bump to OSSM 3.1, we can add this field back.

Follow-up to commit 41d7add.

This commit fixes OCPBUGS-59839.

https://issues.redhat.com/browse/OCPBUGS-59839

* istio.go (desiredIstio): Delete trustBundleName.

Author: Miciah

pkg/operator/controller/gatewayclass/istio.go

@@ -124,7 +124,6 @@ func desiredIstio(name types.NamespacedName, ownerRef metav1.OwnerReference) *sa
 					},
 					IstioNamespace:    ptr.To(controller.DefaultOperandNamespace),
 					PriorityClassName: ptr.To(systemClusterCriticalPriorityClassName),
-					TrustBundleName:   ptr.To(controller.OpenShiftGatewayCARootCertName),
 				},
 				Pilot: &sailv1.PilotConfig{
 					Cni: &sailv1.CNIUsageConfig{