RenderingContext is a good case for a class that creates
"arbitrary" objects: The PreProcessor class names are
retrieved from global configuration in order to be
instantiated.

This initialization is moved into a (install tool mode
compatible) factory in order to transform ObjectManager
into a fallback layer for PreProcessors that are
not defined in the newer PSR container.
Therefore $container->has() is used prior to $container->get(),
in order to fallback to ObjectManager for objects that can't be
retrieved – due to missing configuration – via ContainerInterface yet.

Resolves: #94285
Related: #90803
Releases: master
Change-Id: I3fd1751b8580de7c8307e9b84da38e1551c2c622
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69412


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>