Unifying hardware description

[Drewniok]

          Another high-level comment: At the moment, we are storing kind of proprietary calibration files here. And we store them differently for every provider. It would be great to unify that hardware description format for all the devices here. Which would also allow to share a lot of the code for parsing the calibration files.

(This could be converted to an issue to tackle separately)

Originally posted by @burgholzer in #381 (comment)