[TASK] Migrate Tests from _callRef to _call

Tests should be consistent and reflect the
way we do things in Core. However, testing
framework offers too many different ways to do things,
and "_callRef" is one of that.

Resolves: #89817
Releases: master
Change-Id: I44759df255365d0f90e0928f3f5726b66ecf9f3e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62493


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>