This adds a `get_or_create_lister`pair a function, which stores basic informations to the backend:
about the state of lister instances in the scheduler database. - `get_or_create_lister` pulls the record for a given lister from the database
- `update_lister` updates the record for a given lister in the database
This is one of the basic building blocks for the integration of lister
information directly in the scheduler database (ref. T2442).
Depends on D3270Related to T2442.