Ability to transform columns on _Live tables as well.

[patricknelson]

New feature enabled in https://github.com/patricknelson/silverstripe-migrations/commit/b03a74f21e7482391738845f50719f2daa026e7e allows the ability to transform columns, however, published versions of these objects may not receive these updates since (due to abstraction) _Live tables may not be touched when saving them. Need to upgrade the system to also directly modify these column values (either within the stage itself using Version extension or via SQL which is NOT preferred).