[BUGFIX] Keep UTF-8 characters unescaped in JsonView

Resolves: #84572
Releases: master, 8.7
Change-Id: I7ace7322bdefcaeae5ffcc9021a5f13b4f5aeb1a
Reviewed-on: https://review.typo3.org/56501


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>