[BUGFIX] Respect GFX/jpg_quality when cropping

LocalCropScaleMaskHelper generates thumbnails with
imageMagickConvert and custom crop parameters. This
will overwrite the default settings.

Append the GFX/jpg_quality parameter to the convert command.

Resolves: #81796
Releases: master
Change-Id: Iaa09e8b9134659c9ffba1c2984ef06d2c8250580
Reviewed-on: https://review.typo3.org/56779


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Bernhard Kraft <kraftb@think-open.at>
Reviewed-by: Alessandro <alessandro.filira@pallino.it>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>