Staging instance, all changes can be removed at any time

Aligh swh backends for migration tools to work

Recent migration from the scrubber which did not comply fully with the documentation [1] in regards to migration (through swh db upgrade cli) started some work to fix it [1]. The migration for the scrubber was fixed but broke some other modules as side-effects.

After further discussion with @douardda regarding the multiple proposed and somewhat wrong implementations, we've come to an understanding and a proper plan to fix everything.


Migrated from T4305 (view on Phabricator)

Edited by Phabricator Migration user