Support for new reports.x-k8s.io reports group

[erikgb]

It seems like K8s wg-policy is in the process of switching API group from wgpolicyk8s.io to reports.x-k8s.io, and here is the initial version of the API under the new group: https://github.com/kubernetes-sigs/wg-policy-prototypes/tree/master/policy-report/pkg/api/reports.x-k8s.io/v1beta2.

We plan to migrate image scan reports in https://github.com/statnett/image-scanner-operator to K8s wg-policy reports, mainly to allow visibility to scan reports through policy-reporter. But also to adopt the emerging K8s policy standards. We want to minimize the impact of future changes on our users and prefer to start with the latest edition of wg-policy reports API.

Would it be possible to get support for the new API group in policy-reporter?

I don't know if/when Kyverno has planned migration to this new wg-policy API, but would expect engines to migrate over time.

CC: @JimBugwadia