ceph_config module cannot be used with installations not using orchestrator (e.g. cephadm)

Currently some modules are hardcoded to use cephadm.

Proxmox installations don't use cephadm nor the orchestrator, so it would be a good idea to make commands work both ways. I added the first PR for ceph_config to work this way.

NB! Unfortunatlely ceph_config does not yet have unittests, but I have used my patched version and it works on proxmox now.

This is resolveed by #37

The issue names the ceph_config module and points to #37 as the resolution; read that referenced work first. Verify the module on both cephadm/orchestrator and Proxmox-style installations, noting that unit tests are currently absent. Done means the commands work in both environments and coverage is added if the referenced work requires it.

Written by the indexing model from the issue text.