Continue work for E2E tests for the implementation of "gatewaycontroller" in https://issues.redhat.com/browse/NE-1206 

Some ideas for the test include:

1. Test installation: Create GatewayClass with spec.controllerName: openshift.io/gateway-controller and ensure the following:
   1. Istio Operator successfully gets installed
   2. The expected Gateway API CRDs are installed (done in NE-1208)
   3. The SMCP gets created
   4. Istiod control plane gets stood up
   5. Istio-ingressgateway exists and is healthy
2. Automatic deployments work by creating a Gateway controller - Istio creates an envoy proxy for the gateway
3. End-to-End Ingress Check: Create HTTPRoute, and attach to Gateway, ensure connectivity
4. Ingress op creates the catalog source and subscription automatically for a Istio image that is publicly available