CI: Split backend and frontend test into separate jobs
CI: Split backend and frontend test into separate jobs

Turbo87/skylines,Harry-R/skylines,Harry-R/skylines,Turbo87/skylines,skylines-project/skylines,Harry-R/skylines,skylines-project/skylines,skylines-project/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,Turbo87/skylines,skylines-project/skylines,RBE-Avionik/skylines,Turbo87/skylines,RBE-Avionik/skylines,Harry-R/skylines