(stable) Put the HeraldActionRecord table back on the shelf
Put the table back and accept a tiny bit of cruft here to fix this problem. We can no-op the migration after a while.
I'll cherry-pick this to stable.
Test Plan: Applied migration. Created Herald rules. Reviewed existing Herald rules.
Maniphest Tasks: T8958
Differential Revision: https://secure.phabricator.com/D13736