[TASK] Use TYPO3_SSL for the URL schema enforcement test

The enforement of the url_schema field should not be based
on the requested URL schema, but on the TYPO3_SSL enviroment
variable.

This will make it possible to switch the URL schema
based on enviroment variables.

Resolves: #77781
Releases: master
Change-Id: I8fec7d7787af3397051a256bc5222f2b006ef7c0
Reviewed-on: https://review.typo3.org/49752


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>