[TASK] Merge functional test stages for nightly run

There is no valid reason anymore to separate functional
test stages into 2 runs, so they get merged again.

Resolves: #94064
Releases: master, 10.4
Change-Id: I02385b2332b62ac9f637442b2500b214bd66b357
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69019


Tested-by: core-ci <typo3@b13.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>