R1:e72296f9274d

Support querying Herald rules by monogram in typeahead datsources

Summary:
Depends on D19556. See PHI765. Ref T13164. Currently, if you type `H1` in this datasource, it isn't smart enough to pull up the right object.

Add support for querying by monogram. This is similar to existing support in Owners packages, etc.

Test Plan: Typed `H1` in the new push log filter, got the right object as a result in the typeahead.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13164

Differential…