[TASK] Define callable controller actions

Several custom controller implementations allow calling internal
*Action methods. In order to avoid unintended behavior and to
streamline the application flow those invocations are
defined now explicitly.

ManagementController just had one possible action method and has been
simplified in this regard.

Resolves: #91564
Releases: master, 10.4, 9.5
Change-Id: I9092088ba66504562b42c522883c022955fa6f36
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64667


Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>