[BUGFIX] Reuse entities of overridden classes in persistence session

When saving and retrieving object from the persistence session,
implementation class names set via \TYPO3\CMS\Extbase\Object\Container
are now respected by storing and retrieving them with that overridden
class name.

Resolves: #77617
Releases: master, 9.5
Change-Id: I887cb164328afe789dc274c92c8f8774b2098a40
Reviewed-on: https://review.typo3.org/58959


Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>