This change converts class Action to a native backed enum.
In addition it's moved to namespace \TYPO3\CMS\Scheduler\ and
renamed to SchedulerManagementAction.

Resolves: #101129
Releases: main
Change-Id: I3752754b021a75cb9873806cb670d1adbc20fce4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79476


Tested-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Stefan B�rk <stefan@buerk.tech>
Reviewed-by: Stefan B�rk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Reviewed-by: Benni Mack <benni@typo3.org>