[!!!][TASK] Remove deprecated code in extbase ConfigurationManager

Resolves: #101031
Related: #100963
Related: #100662
Related: #99417
Releases: main
Change-Id: I0540ba27ac6cd0fad7a1f4d544a27c11fc06065e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79315


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