search: Port fulltext_head_queries from airflow v1
Dag performs a daily aggregation of the history of search satisfaction queries, populating a hive table with the top queries issued to full_text on-wiki search during the history of the search satisfaction table (90 days). This is then queried from superset to populate a dashboard giving insight into the queries users are performing.
Simple direct port from airflow 1, no significant changes.
Bug: T330446