R1:63f4e66b1122

Attach HeraldRules to HeraldEffects

Summary:
Ref T7731. For no particular reason, we currently put `ruleID` and `rulePHID` on `HeraldEffect` objects.

Pretty much all callers need the `HeraldRule` objects instead, and some go to great lengths to get them.

Just attach the `Rule` objects.

Test Plan: Will test thoroughly after next-ish changeset.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7731

Differential Revision: https://secure.phabricator.com/D12269