[TASK] Skip another unstable acceptance test

The "addAndDeletePage" acceptance test is still unstable, even with
multiple people trying to stabilize that thing already. To raise acceptance
of acceptance tests during core development, this one is skipped for now.

Resolves: #79913
Releases: master
Change-Id: I55ac9ede4b241a737046d1c0ee16618c314f9d79
Reviewed-on: https://review.typo3.org/51767


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>