[DOCS] Improve documentation for Fluid f:translate viewhelper

Resolves: #92821
Releases: master, 10.4, 9.5
Change-Id: Ife0999560d3da75051b663b55d46e0f6a5e03dfb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66617


Tested-by: Peter Kraume <peter.kraume@gmx.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Peter Kraume <peter.kraume@gmx.de>
Reviewed-by: Chris Müller <typo3@krue.ml>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>