Allow Phame Blogs to be archived instead of deleted

Summary: Removes "delete" and uses "archive/activate" instead for Phame Blogs. Ref T9756

Test Plan: Archive a blog, see in search, activate blog, see in other search.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: joshuaspence, Korvin

Maniphest Tasks: T9756

Differential Revision: https://secure.phabricator.com/D14465