lister-debian: Install debian model within the lister repository
As this is no longer shared between the new debian loader and the lister.
This is just a move from swh.storage.schemata.distribution
to swh.lister.debian.models
towards sandboxing the model where it's needed.
Also, it aligns the scheduled task parameter from origin to url as other package loaders expects.
Related swh-loader-core!37 (closed)
Test Plan
tox
Migrated from D2155 (view on Phabricator)