[TASK] Use PHP 7.4 for pre-merge tests on functionals and acceptance

At least one functional and one acceptance tests run on pre-merge
tests should use PHP 7.4. There are three (with tree DB systems),
so each one uses now one of the supported PHP versions and one of
the supported DBMS.
A complete test run is done during nightly runs due to time
constraints.

Resolves: #89841
Releases: master, 9.5, 8.7
Change-Id: Ie0bbe7309b63142f425bd2ff45c247e70d58fd06
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62530


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>