[BUGFIX] Remove hard coded path to LocalConfiguration.php

Instead of hard coding the path, the ConfigurationManager API
ist now used.

Resolves: #88089
Releases: master, 9.5
Change-Id: I51b6c75583e54f00535538d6afdcb617d86f6079
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60374


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Wolf-Peter Utz <wpu@hotmail.de>
Tested-by: Sebastian Rosskopf <sebastian.rosskopf@gmx.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Wolf-Peter Utz <wpu@hotmail.de>
Reviewed-by: Sebastian Rosskopf <sebastian.rosskopf@gmx.de>
Reviewed-by: Benni Mack <benni@typo3.org>