Put the RunDB API interface and MongoDB interface together

[yuema137]

As most of XENON packages (XENONnT/utilix#136) are using the DB-related functions implemented in straxen, we propose to remove the redundant module in utilix (XENONnT/utilix#138) and keep them within straxen. In general, utilix should only contain fundamental tools that are widely used while straxen should handle the data management and processing tools which are specifically related to xenonnt data. However, as a historical problem, the APIUploader being used by private_nt_aux_files is currently only in utilix.

Therefore, here we migrate the utilix code to straxen, with improved type hint and docstrings. And we switch to the new implementation here in private_nt_aux_file: https://github.com/XENONnT/private_nt_aux_files/pull/387

[coveralls]

coverage: 89.849% (-0.5%) from 90.36%
when pulling 6a29dd6 on add_api_inference_db
into 00804e5 on master.

[dachengx]

Thanks @yuema137 . Please move these later to utilix.