[TASK] Doctrine: Migrate DataHandler last pieces

Change-Id: I19caa14ddd2d0402f8b1ee79dbd4fdc9d6963f96
Resolves: #77609
Releases: master
Reviewed-on: https://review.typo3.org/49557


Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>