Provide a NodeConfig that can setup storage on any node without manual actions

[tnozicka]

What should the feature do?

We should be able to configure the nodes and local-csi driver without the need to manually mess with the node (e.g.) loopback devices or making folders.

Today it's seamless only if you run on real disks, otherwise you need to start tweaking with loop devices or additional virtual disks.

This is very important for us so we can recommend the local-csi-driver as our primary path for every one and have consistent docs and demos.

One of the tasks would be https://github.com/scylladb/scylla-operator/issues/1397 but it may not be the only one.

What is the use case behind this feature?

Consistent setup experience, docs and demos.

Anything else we need to know?

No response

[tnozicka]

code is shipped but we need an example