Control Openshift Route Creation for ingress Gateways

We're currently creating static OpenShift Route resources for every ingress gateway configured in the SMCP. If customers do not want to use those Routes or need a different configuration, they currently have no option to disable their creation. We should add a field that allows this.

Acceptance Criteria:

• add a gateway.route boolean field (default: true) that configures static route creation

Original description:

With OSSM 2.0 an Openshift http route seems to be created for any Ingress Gateway specified in the SMCP without a way to disable route creation. In previous versions we could just disable the istio-ingressgateway and use our own custom gateway without the http route creation. The majority of the time these need to be secure routes - which can be deployed separately.

Is there any way to disable route creation for ingress-gateway or additionalIngress?

Example SMCP: https://github.com/trevorbox/service-mesh-patterns/blob/ossm-2.0-gateways/ossm-2.0/helm/control-plane/templates/servicemeshcontrolplane-basic-install.yaml

Not sure if this is the chart code that creates the routes:
https://github.com/maistra/istio-operator/blob/maistra-2.0/resources/helm/overlays/gateways/istio-ingress/templates/istio-ingressgateway-route.yaml