[TASK] Avoid withConsecutive() in SaveToDatabaseFinisherTest

Testing for the input keys is rather useless, it's
enough to verify the sub method is called twice.

Resolves: #100415
Related: #100249
Releases: main
Change-Id: I1c8e0513b5fa556b512dffe0a192c499d57d605e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78386


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