Move Phabricator to use PhutilBinaryAnalyzer and show binary versions

Summary:
Fixes T12942.

• Adds binary version and path information to Config → Version Information.
• Replaces old code all over the place with new consolidated code.

Test Plan:

Also faked some cases of missing binaries, bad versions, etc.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12942

Differential Revision: https://secure.phabricator.com/D18306