Allow temporary setting of the live workspace for backend users that
don't have permission "Edit Live (Online)". These users can now use the
comparison view in the frontend and compare the live version with the
workspace version.

Resolves: #93097
Resolves: #98445
Releases: main, 11.5
Change-Id: I7915c5a1ca32ed25655ce227db9c88872663f942
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76272


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>