support dry run + report events

[daniel-ro]

support dry run mode, so objects won't be deleted

Also, send k8s events to:

• to the ResourceManager object that manage it
• to the logs of the controller
• (should we?) the k8s object itself (for example: if we set expiry on objects named "my-deployment", send event to this object)

[bkomraz1]

Looks dry-run and loggs already implemented.
@daniel-ro