[BUGFIX] Add more migration hints for config.tx_extbase.objects

The suggested migration (xclasses) does not work for Models
mapped using the PropertyMapper.
It also fails if additional injections have been configured.
(though that could be fixed using
`GeneralUtility::makeInstance(ObjectManager::class)->get()`)

Change-Id: If22b98526fce575435662e731a4f2efca9a014f3
Releases: master
Resolves: #86290
Related: #86270
Reviewed-on: https://review.typo3.org/58310


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>