[TASK] Raise typo3/testing-framework to ^6.5.0

Brings an acceptance test stabilization fix and a
functional test API method to execute frontend
requests as sub request with core v11 / master.

composer require --dev typo3/testing-framework ^6.5.0

Resolves: #92965
Releases: master, 10.4
Change-Id: Ic8600d369f436569658e7cc593c428e6eb70db0a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66960


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>