Why you need it?

Actually ingressclass is managed automatically. So it's not possible to "force" the configuration to accomodate some not yet supported kubernetes providers.

How it could be?

add a ops config ingress --class=<auto|nginx|traefik|public>

Other related information

the configuration will add a OPERATOR_CONFIG_INGRESSCLASS value. This should be added to [whisk.yaml](https://github.com/apache/openserverless-task/blob/main/setup/kubernetes/whisk.yaml) under spec.nuvolaris. ingressclass`