Support searching for Harbormater build plans by name substring

Summary: Ref T10457. Allow build plans to be queried by name.

Test Plan:

• Searched for plans by name.
• Renamed a plan, searched for new name.

{F1133085}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10457

Differential Revision: https://secure.phabricator.com/D15359