[TASK] Enable phpstan TernaryOperatorConstantConditionRule

Releases: master
Resolves: #90913
Change-Id: If38a526547518e93b3002ffa01accebf4a12e5b3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64032


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>