Fix e2e tests and examples to be compatible w/ latest CRDs

[solmonk]

What type of PR is this?

bug

Which issue does this PR fix:

Partially - #469

What does this PR do / Why do we need it:

Changed behavior for empty matches in rules. They had default value in the past but they don't right now.
https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io%2fv1.HTTPRouteRule
https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1alpha2.GRPCRouteRule

Fixed our examples to be compatible with latest GWAPI CRDs.

• HTTPRoute/GRPCRoute - All Service backendRefs require ports
• Gateway - HTTPS listeners must have TLS section
• Gateway - TLS section must include at least one cert when mode is Terminate
  • This is a tricky part, I had to add dummy fields on our examples. It looks ugly but probably okay.
• Gateway - Listeners must be unique on name/port/hostname

If an issue # is not available please add repro steps and logs from aws-gateway-controller showing the issue:

Testing done on this change:
make e2e-test all pass

Automation added to e2e:

Will this PR introduce any new dependencies?:

Will this break upgrades or downgrades. Has updating a running cluster been tested?:

Does this PR introduce any user-facing change?:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[xWink]

Thank you for fixing these issues!