[BUGFIX] Include composer dumpautoload in Test Plan Jobs

Resolves: #91349
Releases: master
Change-Id: I60ffcb35a82d7e890590f836dcfd9e0739c8db03
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64440


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>