Remove active, bulk, regen and deactivate attributes from seeds.yml

• active is set to false for a few questionnaires but not likely we'll need to set this via seeds.yml. Column defaults to true in DB, so safe to omit. Was giving issues because it wasn't set in attrs and thus was left nil in the seed. Column is (sadly) nullable, so this meant new questionnaires weren't active

• bulk is false for all questionnaires, defaults to false in DB so safe to omit.

• outcome_regeneration_requested_at is now handled via the versions

• deactivate_answers_requested_at is now handled via the versions