Add "Author's Packages" and "Committer's Packages" Herald rules for Commits and Hooks

Summary: Fixes T13480. Adds the remaining missing Owners package rules for Herald commit adapters.

Test Plan: Created hooks which care about these fields, pushed commits, saw sensible transcript values.

Maniphest Tasks: T13480

Differential Revision: https://secure.phabricator.com/D20957