[TASK] Avoid invalid method in DataMapFactoryTest

Resolves: #100420
Related: #100249
Releases: main
Change-Id: Ib5b3fc4bbf9f8e9f13fddfabdce3cba7a2df7591
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78391


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>