Improve Drydock log search engine

Summary: Ref T2015. This allows searching based on blueprints, resources or leases when viewing the logs, which helps when searching for events that occured to a particular blueprint / resource / lease. Unlike the logs shown on the resource / lease pages, the search engine supports paging properly, which means it can be used to find entries in the past.

Test Plan: Used the Drydock log search page.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: joshuaspence, Korvin, epriestley

Maniphest Tasks: T2015

Differential Revision: https://secure.phabricator.com/D10874