Problem
Currently APIServerSource sends create, update and delete event types to the sink specified. Our use case can benefit of receiving just delete events instead. This will reduce the load our receiver experiences. Instead of discarding the message on the receiver we will discard it on the producer (the APIServerSource).

The APIServerSource resource could support an additional optional property called spec.eventTypes that is a list that allows for create, update and delete as values. By default the three of them would be specified, so the current behaviour is retained.

This introduces a if/else for each message so performance is reduced for the default case (current behavior), however there are performance gains when some events are excluded. The most important performance gain would be if the user removes the update event type. I'm trying to come up with a solution that does not reduce performance for the default case.

Persona:
Which persona is this feature for? Event Consumer and Event Producer

Exit Criteria
The event types sent to the sink are of the type selected.