Enable Webhook Warning messages, add Gateway API integration and simply Ingress integration

[shengnuo]

This PR introduces a new field under .spec.router for NIMService and NeMo Microservices, for integrating with Ingress or Gateway API.

The created routing object will have the hostname in the format <.metadata.name>.<.metadata.namespace><.spec.router.hostDomainName>

Gateway API

Sample router for Gateway API integration

  router:
    gateway:
      namespace: nemo
      name: istio-gateway
    hostDomainName: foobar.com

Only HTTPRoutes is supported from Gateway API.
GRPCRoutes is pending.

Ingress

Sample router for Ingress integration

router:
  ingress:
    ingressClass: nginx
    tlsSecretName: my-secret
  hostDomainName: foobar.com

Deprecation

NIMService.spec.expose.ingress will be deprecated. The field is present, a warning message from webhook will be display.

The deprecated fields will remain for sometimes for backward compatibility.

[copy-pr-bot]

This pull request requires additional validation before any workflows can run on NVIDIA's runners.

Pull request vetters can view their responsibilities here.

Contributors can view more details about this message here.

[shivamerla]

LGTM!