Modularize all remaining Pholio Herald fields

Summary: Ref T8726. Use modular fields for the Pholio adapter.

Test Plan:

• Created rule using all the old fields.
• Migrated, saw upgrade apply correctly.
• Created mock, reviewed transcript.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: eadler, epriestley

Maniphest Tasks: T8726

Differential Revision: https://secure.phabricator.com/D13513