Improve Gateway API concerning protocol: HTTPS

[jeromeguillaume]

Where is the problem?

https://docs.konghq.com/kubernetes-ingress-controller/latest/concepts/gateway-api/#gateway-management

What happened?

About the protocol: HTTPS property in the example, it lacks the tls and hostname properties. I guess it also concerns the protocol: TLS

1. If we don't put the tls property, there is an error message in the console when we do kubectl apply: Invalid value: "array": tls must be specified for protocols ['HTTPS', 'TLS']
   2.If don't put the hostname property, there is an error message in the Ingress Controller pod: ["must be a valid hostname with a wildcard prefix '*' ornwithout"],"type":"ERROR_TYPE_FIELD"}])

What did you expect to happen?

Having a HTTPS and TLS proper example like this:

1. Create a kong-secret-proxy with kubectl create secret tls

apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: kong
  namespace: kong
spec:
  gatewayClassName: kong
  listeners:
  - name: proxy-kong
    port: 80
    protocol: HTTP
  - name: proxy-kong-tls
    port: 443
    protocol: HTTPS
    hostname: kong.client.com
    tls:
      mode: Terminate
      certificateRefs:
        - kind: Secret
          group: 
          name: kong-secret-proxy
    allowedRoutes:
      namespaces:
        from: All

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