Further modernize OwnersPackageQuery
Summary:
Ref T8320.
- Add needOwners().
- Split withOwnerPHIDs() [exact owners] and withAuthorityPHIDs() [indirect authority] apart.
- Restore searching by path.
Test Plan: Browsed pacakges, edited packages, edited paths.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T8320
Differential Revision: https://secure.phabricator.com/D13922