[TASK] Replace prophecy in EXT:core DataHandlerTest

Resolves: #98971
Releases: main
Change-Id: I8bac1331435b06df7cd253f8e96f95e6b9f4cf89
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76849


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>