[FEATURE] Report wrong database character set

This adds a new report to the reports module that checks if the MySQL
database uses the right character set.

Change-Id: I5e5d8b4767accb74f3cbfb8eb4c9f4824dfd7eca
Resolves: #74038
Releases: master
Reviewed-on: https://review.typo3.org/47016


Reviewed-by: Jonas Götze <jonnsn@gmail.com>
Tested-by: Jonas Götze <jonnsn@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>