Refactoring: - part 2: restructure start scripts (try to minimize workload for the login node on the cluster when starting a REMIND run by moving code into scripts that are included in the slurm job)

Refactoring - delete realization linadjust of module 45_carbonprice, general code cleaning (mainly start_functions.R)

             - remove old_cluster

These are mainly naming inconsitencies in the welfare module.