[TASK] Mock interfaces instead of abstract classes

`getMockForAbstractClass` has been (soft-)deprecated in PHPUnit 10.1:
https://github.com/sebastianbergmann/phpunit/issues/5241

Hence, we should replace its usages to follow current best practices.

This changes tackles the classes where we can mock an interface
instead of an abstract class, allowing us to use `createMock` instead
of `getMockForAbstractClass`.

Resolves: #101609
Related: #101601
Releases: main, 12.4
Change-Id: I995f70d779a1bc6251bc4479c3dcb2ee548314f1
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80455


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan B�rk <stefan@buerk.tech>
Tested-by: Stefan B�rk <stefan@buerk.tech>