[TASK] Doctrine: migrate ext:backend/Controller/EditDocumentController

In addition to switching the QueryBuilding to Doctrine the grouping
of retrieved in ``getLanguages()`` has been updated to be compatible
with MySQL ONLY_FULL_GROUP_BY mode by limiting the selected columns
and grouping the result by all of them.

Resolves: #75784
Releases: master
Change-Id: I1fdac9ba736d93df257e117abc5f0960d69ab7c6
Reviewed-on: https://review.typo3.org/47818


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Tested-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>