Similar to T397923 for `categorylinks`, the `imagelinks` MediaWiki table is being normalized in T299953 and we should adapt to it.
In addition to Sqoop, it's possible that Commons Impact Metrics also depends on this table directly.
I think T415786 is the ticket that tracks the actual migration in the production database.
We need to do the following:
[] Add il_target_id to Sqoop's imagelinks table definition in python/refinery/sqoop.py
[] Drop il_to column from Sqoop's imagelinks table definition by setting value to null
[] Update the CREATE HQL script of mediawiki_imagelinks with the new columns added
[] Run alter table statement on table wmf_raw.mediawiki_imagelinks in Hive to the new column (ALTER TABLE ADD COLUMN...)
[] Update [[ https://gerrit.wikimedia.org/g/analytics/refinery/+/f84b3cc25cb6c4219e951f80f624d69e25f0548b/hql/commons_impact_metrics/category_and_media_with_usage_map.hql | commons_impact_metrics ]] hql script