[TASK] Set phpstan parameter checkPhpDocMissingReturn to true

Releases: master
Resolves: #90802
Change-Id: I84da713c7b8c68ae67b6b9c33ad66dcbac8d72bb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63810


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>