[TASK] Protected methods in ReportController

There are only two methods in the report controller, calling
them via call_user_function() does not make much sense.
The patch simplifies the dispatcher logic and sets the two
actions to protected.
Note this does not affect the extendability of the reports
module itself.

Resolves: #86184
Related: #84231
Releases: master
Change-Id: Ia329b7de7251825028a5587899be3f6c694873e5
Reviewed-on: https://review.typo3.org/58214


Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: rolandgolla <rolandgolla@gmail.com>
Tested-by: rolandgolla <rolandgolla@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>