Add cleaning command

[dgil]

It would be nice to have some way to remove all the pods and services running.

Do you think we could add it?

My proposal: ka nuke 😁

[ekozan]

kubernetes::reset ?? 

[dkapanidis]

That is used for cleaning up the kubernetes state which in some cases is
left in weird state. I think this is a no issue now and maybe can be
removed.

Kubectl drain is draining the pods from the node and probably we should
execute a step during ka down to drain the node. I wouldn't do a nuke of
the docker itself since it might have more containers that shouldn't be
touched.