Reference bitbucket mercurial origins

Origins loaded so present in the archive and in the scheduler db (table origin-visit-stats). As those origins were not listed through a lister though, they are filtered out during the scheduler metrics update (sql routine which does an inner join).

We need to reference those origins so they can show up properly in the scheduler metrics (and thus in https://archive.softwareheritage.org main page).

The simpler way seems to attach those origins with the bitbucket lister, retrofill the listed origins from origin-visit-stats as disabled ones. And then let the remaining cogs do the rest.

Or simply reference the bitbucket mercurial origins in a discontinued entry in the archive's main page (coverage section) [1]

• [1] D6475

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Migrated from T3658 (view on Phabricator)