[BUGFIX] Allow custom foreign_table_where for TCA type category

The "foreign_table_where" option is no longer
forced by TcaPreparation for TCA type "category",
which had been introduced with #94622.

Resolves: #98656
Related: #94622
Releases: main, 11.5
Change-Id: I8cab56881bab042e46b2325bee80665b83423948
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76440


Tested-by: core-ci <typo3@b13.com>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>