ContentIndexer: convert hash to bytes.
When received via the scheduler (which manipulates JSON), it's a string.
The RevisionIndexer uses the exact same conversion code.
Test Plan
docker-compose up
python3 -m swh.loader.git.loader --origin-url https://github.com/SoftwareHeritage/swh-storage.git
echo 'indexer_mimetype;oneshot;[["6dfe5dd2ab86d1ad3677285155027332fb35e9e5"]];{"policy_update": "update-dups"}' | python3 -m swh.scheduler.cli --cls remote --url http://localhost:5008/ task schedule /dev/stdin -c type -c policy -c args -c kwargs -d ';'
Migrated from D874 (view on Phabricator)