Summary: Ref T7689. Fixes T7688. When there are a bunch of tokenizers with different values of the same object type (e.g. 5 tokenizers with users a, b, c, d, e) we currently issue 5 separate queries to load their handles. Improve this behavior in the common case so we can usually batch these loads. Test Plan: - In Maniphest, set the various search fields to different values. - Used DarkConsole to examine query plan. - Saw fewer queries after patch than before. Reviewers: btrahan Reviewed By: btrahan Subscribers: epriestley Maniphest Tasks: T7688, T7689 Differential Revision: https://secure.phabricator.com/D12261