Support logged-out access to more Harbormaster controllers

Summary:
Fixes T13145. The list controllers properly support public access already, but some of the view/detail controllers did not.

Allow logged-out users to browse builds, buildables, plans, etc., provided they can see the corresponding objects.

Test Plan: As a logged-out user, browsed around builds, build plans, logs, etc., without hitting any login pages.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13145

Differential Revision: https://secure.phabricator.com/D19459