Simplify Owners interfaces to Audit

Summary:

• Owners has "by user" commit views, but these are supplanted by the Audit views. Just nuke them.
• Owners has "by package" commit views; consolidate these onto the package detail pages and link into Audit for full details.

Test Plan: Browsed all the Owners interfaces, clicked "View All ... Commits" buttons.

Reviewers: btrahan, jungejason

Reviewed By: btrahan

CC: aran, epriestley

Maniphest Tasks: T904

Differential Revision: https://secure.phabricator.com/D1764