[TASK] Centralize reactions and webhooks management

To centralize workflows, reaction and webhook
records should only be managed in their dedicated
backend module.

Resolves: #100434
Releases: main
Change-Id: Iae76c6d559b30127677af601af303e85bc0e5bf8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78442


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>