Add award and revoke conduit calls to Badges

Summary: Allow people to award and remove badges via conduit, but not from the standard badges form.

Test Plan:
Build a generator and generate awards. Didn't test the revoke yet.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T12270

Differential Revision: https://secure.phabricator.com/D17482