[TASK] Avoid Fluid JS escaping trick in new content wizard

Assigns the entire goToalt_doc JS method from the new
content wizard controller, which prevents the need for
using a JS escaping trick in Fluid.

Releases: master, 9.5, 8.7
Resolves: #90283
Change-Id: I9a3a49e4d32f25cf940672101f58da5064e9a478
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63110


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>