Skip loading transaction handles in an old migration

Summary:
Ref T13305. See that task for discussion.

This old migration may indirectly cause search index worker tasks to queue by loading handles. They'll fail since we later added `dateCreated` to the worker task table.

Use `needHandles(false)` (since we don't use them) to disable loading handles and avoid the problem.

Test Plan:
  - Ran `bin/storage upgrade -f` on an older instance (late 2016) and hit this issue.
  - Applied the patch, got a clean migration to modernity.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13305

Differential Revision: https://secure.phabricator.com/D20570

resources/sql/autopatches/20180208.maniphest.02.populate.php

@@ -26,6 +26,7 @@ foreach (new LiskMigrationIterator($table) as $task) {
   $xactions = id(new ManiphestTransactionQuery())
     ->setViewer($viewer)
     ->withObjectPHIDs(array($task->getPHID()))
+    ->needHandles(false)
     ->withTransactionTypes(
       array(
         $type_merge,