[BUGFIX] Add sites folder to install tool permission check

This patch adds the directory `typo3conf/sites/` and for composer based
installs `config/sites/` to the directory status check in the install
tool.

Resolves: #91488
Releases: master, 10.4
Change-Id: I059c92d7ec2d740ba3f7d3c5d81181cadc146681
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64577


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Daniel Haupt <mail@danielhaupt.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>