search.journal_client: Actually filter on full origin_visit_status

I think something went badly in some old rebase I did because I thought that was already the case.

Or I may conflate with the other indexer journal client... [1]

• [1] https://forge.softwareheritage.org/source/swh-indexer/browse/master/swh/indexer/journal_client.py$25

Test Plan

tox

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Migrated from D4749 (view on Phabricator)