This updates the script for resetting the database so that it drops and
recreates all the tables, instead of disabling Postgres triggers and
truncating most of the tables. The latter strategy requires superuser
permissions in Postgres that the db user we manage in Azure does not
have. The script now:
- drops the tables
- reruns the alembic migrations
- reseeds the permission sets
Renamed this script because it's current name is misleading. It does not
just remove sample data; it truncates every table except the alembic
version table and `permission_sets`.