Revert "[TASK] Let GeneralUtility::makeInstance() throw exception on unknown class"

This reverts commit 4bc4fb02.

The patch turned a PHP \Error into \Exception, which adds no value,
but can be misleading.

Change-Id: I6cc32da6c0620cb0d717c930d10fa4338d6cefac
Releases: master, 8.7
Resolves: #82131
Reverts: #82131
Reviewed-on: https://review.typo3.org/54004


Reviewed-by: Helmut Hummel <typo3@helhum.io>
Tested-by: Helmut Hummel <typo3@helhum.io>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>