[TASK] Remove dependency to TSFE from AdminPanel initialisation

The dependency of AdminPanel initialisation and TSFE has been dissolved.
Furthermore, the AdminPanel initialisation has been better integrated
into the PSR-15 middleware process by providing modules with an option
to manipulate the request object during initialisation.

Resolves: #88807
Releases: master
Change-Id: I9db2d3056d8216e15ff3303a7667ff7a4d8016e3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61323


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>