CaloRec python tests, retrieve CaloDetDescrManager from CondStore rather than DetStore
This relates also to ATLASRECTS-7438.
Here is just the python unit tests for one package.
ping @fwinkl , @ssnyder , @tsulaia
To get a green CI I assume we need !59419 (merged) first in.
The python unit tests needs fixing obviously but these should not block the basic CI tests