Make Releeph a normal prototype application

Summary: Fixes T6177. Now that we've reframed "Beta" into "Prototype", there's no reason this needs to be in a separate super-hidden class of application anymore.

Test Plan: Saw Releeph available as a normal Prototype application.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T6177

Differential Revision: https://secure.phabricator.com/D10550