[BUGFIX] Use scheme from EnvironmentVariables for forceAbsoluteUrl

Resolves: #78699
Releases: master, 7.6
Change-Id: If238a92e20f2382ad3b37a231992a122eff80826
Reviewed-on: https://review.typo3.org/50661


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Stephan Großberndt <stephan@grossberndt.de>
Reviewed-by: Frederic Gaus <frederic.gaus@flagbit.de>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>