Chore: Update extensions/v1beta1 to networking.k8s.io/v1 on OpenAPI-2-Kong

[filfreire]

This is in order to follow the deprecation guide of past k8s version +1.22

https://kubernetes.io/docs/reference/using-api/deprecation-guide/#ingress-v122

Migrate manifests and API clients to use the networking.k8s.io/v1 API version, available since v1.19.
All existing persisted objects are accessible via the new API
Notable changes:

• spec.backend is renamed to spec.defaultBackend
• The backend serviceName field is renamed to service.name
• Numeric backend servicePort fields are renamed to service.port.number
• String backend servicePort fields are renamed to service.port.name
• pathType is now required for each specified path. Options are Prefix, Exact, and ImplementationSpecific. To match the undefined v1beta1 behavior, use ImplementationSpecific.

changelog(OpenAPI-2-Kong): Generated ingresses for KIC are now using the networking.k8s.io/v1 API version

[filfreire]

@wdawson for awareness:

• once merged this is breaking change for folks using kubernetes bellow v1.19.
• kubernetes 1.21 enters maintenance mode on 2022-04-28, End of Life is 2022-06-28
• kubernetes 1.22 enters maintenance mode on 2022-08-28, End of Life is 2022-10-28
• not merging means on the other hand that the experience is broken for folks using kubernetes above and including 1.22.

Source: https://kubernetes.io/releases/patch-releases/

[wdawson]

Let's make sure we document this really well but sounds like we need to make a major version bump for sure.