Add analog of sysdig's -pk, -pc, -pm to provide container/k8s/mesos specific information

[mstemm]

Currently, all falco rules provide general information for each notification that contains host-level information like the process name, arguments, file being read/written/etc, network connection, etc.

It would be nice if you could also provide container level information like the container name, kubernetes level information like the pod, mesos level information like the app, etc. in the notification output, without having to add it to each rule's output format string.

Sysdig does this via -pk, -pc, and -pm arguments that change the default output format. We could do a similar thing here.