Remove nearly all remaining references to "Autoclose"

Summary:
Depends on D20464. Ref T13277. Broadly:

• Move all the "should publish X" and "why aren't we publishing X" stuff to a separate class (PhabricatorRepositoryPublisher).
• Rename things to be more consistent with modern terminology ("Publish", "Permanent Refs").

Test Plan:
This could use some trial-by-fire on secure, but:

• Grepped for all symbols.
• Viewed various commits.
• Reparsed commits.
• Here's a commit with an explanation:

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13277

Differential Revision: https://secure.phabricator.com/D20465