[!!!][TASK] Remove CategoryRegistry and API method

The CategoryRegistry together with the corresponding
API method "makeCategorizable()" has been superseded
by the TCA type "category" and is therefore now removed.

Resolves: #96153
Related: #85613
Releases: main
Change-Id: I95585c02da8a2a3334ab982fe0c541092ad61854
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72393


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