[!!!][TASK] Update doctrine/dbal 2.6.3 ❯ 2.7.1

Command used:
composer require doctrine/dbal:^2.7

Resolves: #84744
Releases: master
Change-Id: I7b063cd15d8bc7f9c466d654f890c6c56eeb3c25
Reviewed-on: https://review.typo3.org/56681


Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>