Add support for buggify actions in the plugin

[johscheuer]

What would you like to be added/changed?

I would like to have the possibility to run different buggify actions with the plugin e.g.:

kubectl fdb buggify creah-loop -c test-cluster pod1

That makes it easier for an operator to use this feature. We should also implement a clear/clean method to remove Pods from the list again (or clear the whole list).