satnogs-setup: Allow optional execution of ansible roles for SatNOGS Optical
For SatNOGS Optical Stations the set of required ansible roles (common, satnogs_setup, satogs_optical) is different to the set of roles required for SatNOGS (RF) Stations (common, satnogs_setup, satnogs_client, etc).
During bootstrap it should be possible to select between modes: SatNOGS (RF) or SatNOGS Optical
Right now this selection is done by using a different branch of satnogs-client-ansible.
Provide different playbooks for SatNOGS (RF) and SatNOGS Optical.