[TASK] Raise typo3/testing-framework:^6.16.4

A series of minor TF fixes, nothing fancy.

composer req --dev typo3/testing-framework:^6.16.4

Change-Id: I3b8fcec5d16398ba0b1b88379c3dc54b129252d3
Resolves: #97600
Releases: 11.5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74592


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>