Modular Transactions for Badges

Summary: Ref T12270. This converts Badges to modular transactions for editing and awarding.

Test Plan: Add Badge, edit badge, award and revoke... Still going to test this some more but feel free to comment on anything obviously wrong?

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T12270

Differential Revision: https://secure.phabricator.com/D17402