R1:3860c56e8575

Allow querying triggers by ID/PHID

Summary: Ref T6881. I just want to show trigger info in the instance management console.

Test Plan: Will test in Instances.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T6881

Differential Revision: https://secure.phabricator.com/D11428