[DOCS] Deprecate inline JavaScript in Dashboard

Releases: main
Resolves: #97915
Change-Id: I5dd0812847d1984b312e1d452ff38232b20f100a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75159


Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Lina Wolf <112@linawolf.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Lina Wolf <112@linawolf.de>