[TASK] Replace prophecy in EXT:form ArrayFormFactoryTest

Resolves: #98908
Releases: main
Change-Id: Ibf9f2f47ed9343d8b91052bf0e06601ccb96d60f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76326


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