Use PhrictionDocumentQuery to load documents

Summary: Ref T4029. We use a lot of very outdated content loading in Phriction, which blocks T4029.

Test Plan:
- Called phriction.info
- Called phriction.history
- Called phriction.edit
- Viewed document list.
- Deleted a document.
- Viewed history.
- Viewed a diff.
- Created a document.
- Edited a document.
- Moved a document.
- Tried to overwrite a document with "new".
- Tried to overwrite a document with "move".
- Viewed a moved document note.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: shadowhand, epriestley

Maniphest Tasks: T4029

Differential Revision: https://secure.phabricator.com/D9194