Aims to combine disabling site-specific CSP with report-only mode later.

This reverts commit acf70306.

Reverts: #104549
Resolves: #104633
Releases: main, 12.4
Change-Id: I651f60d7b5cc24133801412c8f09b1efba98d3f4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/85646


Reviewed-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Garvin Hicking <gh@faktor-e.de>