[Gateway API v1.2 ] GEP-1762: In Cluster Gateway Deployments

To comply with [GEP-1762: In Cluster Gateway Deployments](https://gateway-api.sigs.k8s.io/geps/gep-1762/) , EG
* MUST label all generated resources (Service, Deployment, etc) with gateway.networking.k8s.io/gateway-name: my-gateway (where my-gateway is the name of the Gateway resource).
* MUST provision generated resources in the same namespace as the Gateway if they are namespace scoped resources.
Cluster scoped resources are not recommended.
* SHOULD name all generated resources my-gateway-example (-). This is not simply NAME to reduce the chance of conflicts with existing resources. Where required, this can also serve as the prefix for the object.

Related:
* https://github.com/kubernetes-sigs/gateway-api/issues/3365
* https://github.com/envoyproxy/gateway/issues/2629