[TASK] Allow extension scanner reporting for dirs outside typo3conf

Resolves: #97008
Releases: main, 11.5
Change-Id: I00e34e4d43d1babd085435d096af773876480e49
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73679


Tested-by: core-ci <typo3@b13.com>
Tested-by: Helmut Hummel <typo3@helhum.io>
Tested-by: Simon Gilli <typo3@gilbertsoft.org>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Jan Helke <jh@f7.de>
Reviewed-by: Simon Gilli <typo3@gilbertsoft.org>
Reviewed-by: Benni Mack <benni@typo3.org>