The styleguide extension generator creates a site configuration
for its page tree for a while already. The manual creation
of a site is not needed in acceptance PageTreeFilterCest.

Resolves: #93488
Releases: master, 10.4
Change-Id: Iaaafd2d07589d1fcc370a4c22024e34d1182af35
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67689


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>