[TASK] Add scheduler package as suggested if used

If a system extension uses the scheduler it should be added to the suggest section.

Resolves: #85671
Releases: master, 8.7
Change-Id: I2f0f8155c768eb140ef6a900640e2d18ac615d79
Reviewed-on: https://review.typo3.org/57703


Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Jörg Bösche <typo3@joergboesche.de>
Reviewed-by: Helmut Hummel <typo3@helhum.io>
Tested-by: Helmut Hummel <typo3@helhum.io>