Apply storage adjustments as part of storage upgrade
Fixes T1191. I'll write up the changelog with notes about this and open a feedback task for followups.
When you run storage upgrade, automatically run storage adjust afterward. Provide a flag to disable this.
This brings everyone into the utf8mb4 world.
Test Plan: Ran bin/storage upgrade with various flags. Ran bin/storage adjust.
Reviewed By: btrahan
Maniphest Tasks: T1191
Differential Revision: https://secure.phabricator.com/D10800