[!!!][TASK] Remove deprecated usage of 'additionalJavaScriptPost'

Resolves: #101054
Related: #100963
Related: #100587
Releases: main
Change-Id: I1073620ec4012d1ac3a8f6d9dc182cc8c8de9071
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79336


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>