[TASK] Move CleanerTask tests to functional tests

Unit tests requiring database connection and mocking half the world are
better of to be reimplemented as functional tests.
This has been done to two of CleanerTask tests, which are easier to read
and understand now.

Resolves: #92437
Releases: master, 10.4
Change-Id: I3c36f2c37050cef3cb1aca96874cb889456552d8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65952


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>