K8s Ingress Releaser Support for IngressClass

[philnielsen]

Is your feature request related to a problem? Please describe.
I would like to natively use the ingressClassName on the k8s releaser. This has been stable since k8s 1.19

Describe the solution you'd like
another field in the ingress release manager for ingressClassName

Describe alternatives you've considered
some ingress controllers have started dropping support for the alternative which is using annotations for ingress-class.

Explain any additional use-cases
most ingress controllers have support for this as it has been stable for several k8s releases now.

Additional context
Add any other context or screenshots about the feature request here.