[TASK] Mark TypeConverterException final

Class \TYPO3\CMS\Form\Mvc\Property\Exception\TypeConverterException
provides a factory method fromError to instantiate new instance of
itself. It's done via new static(...) which is unsafe if the class
is not final as the implementation cannot know if constructors of
sub classes have the same method signature like itself.

One solution to this issue is to make a class final, another is to
use new self() instead of new static(). In this case, the class is
made final as this is a very specific Exception already and unlikely
to be extended.

Releases: master
Resolves: #90401
Change-Id: I4f1127cc423cb1c865b8f422a3047ad5888d00f4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63275


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>