Write Luigi tasks to generate the citation dataset

It should run similar analyzes to https://annex.softwareheritage.org/public/dataset/license-blobs/2022-04-25/ but on citation.cff and codemeta.json files collected here: https://annex.softwareheritage.org/public/dataset/citation-blobs/2022-04-25/

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Migrated from T4714 (view on Phabricator)