add daemonset template

[mrandreyeff]

This adds an option to deploy in daemonset mode, e.g. set:
daemonset: true
replicaCount: 0

Ideally there is a need to move many variables away from "deployment" (or renaming it to more common key), but this require changes in values config for existing deployments, so currently it is being reused.

[weeco]

Hey @mrandreyeff ,
can you explain for what reasons one would want to use a Daemonset instead of a Deployment for KMinion?

[mrandreyeff]

In our particular case the initial goal was to check k8s node may write/read to/from kafka (per node ACLs).
As a pleasant bonus - e2e metrics for each k8s node against kafka cluster.
But worth to note that I disabled gathering most of other metrics to keep pods small (will push the switches later this week), since quite many are gathered by other means (jmx_exporter, burrow, etc).

Pushed here just in case someone needs something similar.

[weeco]

Thanks for explaining the usecase, that's interesting and I have not even remotely thought about that. I just added one more comment about how the values should be structured, so that it is extensible in the future.

Thanks!