Modernize Drydock SearchEngine implementations

Summary:
Ref T9252. Move these to the more modern stuff to pick up ordering and interface support for free.

Also work around the blueprint / custom field integration a little more gracefully.

Test Plan: Searched for blueprints, resources and leases.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9252

Differential Revision: https://secure.phabricator.com/D14155