[TASK] Revert "Prevent requiring "typo3conf" for Composer mode in Dir. Status"

This reverts commit 4b89b371.

Reason for revert: The typo3conf folder is still used
by the backend:lock and backend:unlock cli commands
and the corresponding backend locking functionality

Releases: 12.4
Resolves: #104119
Related: #104074
Change-Id: I37a658b7123aaf3b015a8982efbb4af72b9ec1f0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84649


Tested-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Garvin Hicking <gh@faktor-e.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>