[TASK] Set about module free from Extbase

The whole Extbase stack for the about module
is not necessary, as there is only one action
in this controller, and it's a simple Fluid
action.

The module name is kept as "help_AboutAbout"
due to the uncool naming handling of Extbase magic.

Resolves: #83899
Releases: master
Change-Id: I6353c30528d619f849ea77774b16ff0eb499e820
Reviewed-on: https://review.typo3.org/55714


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>