frontend: Migrate from `core/v1` Event to `events.k8s.io` Event

[sniok]

we should use "new" Event object from events.k8s.io api group instead of legacy core Event, the doc linked below goes into more details about why

https://github.com/kubernetes/enhancements/blob/master/keps/sig-instrumentation/383-new-event-api-ga-graduation/README.md

[skools-here]

Hi @sniok ,

I'd be interested in working on this.

Before starting, I wanted to clarify the expected migration strategy. Should we:

1. Completely replace usage of core/v1 Events with events.k8s.io/v1, or
2. Support both APIs for compatibility with older clusters?

Thanks!