[BUGFIX] Detect recursions in PageContentErrorHandler

Possible recursions that can occur while fetching the content of an error page are now detected and resolved.

Resolves: #86626
Releases: master
Change-Id: I72ca04bd57ac400e14a06231218cee903c713675
Reviewed-on: https://review.typo3.org/58615


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>