refactor and clean up FE demand calculations

[fbenke-pik]

Depends on PR remindmodel/remind#1543

This PR moves introduction of duplicate scenarios (Navigate, Campaigners) to the latest point possible

• Duplication no longer happens in readStationary, convertStationary, calcFeDemandIndustry
• Instead, it now happens in calcFeDemandBuildings and calcFEdemand
• I verified, that this does not change content of the generated inputdata files.

This PR removes files no longer needed in REMIND because of the deletion of the complex transport module

• removes code generating the following files f35_factorVintages.cs3r, f35_transp_eff.cs3r, f35_bunkers_fe.cs4r, pm_boundCapEV
• removes f21_vehiclesSubsidies.cs4r and calcTransportSubsidies, as they contain no longer used data apCarElT and apCarH2T
• removes apcarelt, aptrnelt, apcarh2t, apcarpet, apcardit, apcardiefft, apcardieffH2t from f_cf.cs3r

[fbenke-pik]

This PR moves introduction of duplicate scenarios (Navigate, Campaigners) to the latest point possible

• Duplication no longer happens in readStationary, convertStationary, calcFeDemandIndustry
• Instead, it now happens in calcFeDemandBuildings and calcFEdemand
• I verified, that this does not change content of the generated inputdata files.

@robinhasse @0UmfHxcvx5J7JoaOhFSs5mncnisTJJ6q this affects code you are working with, but hopefully should make things easier.

[robinhasse]

Thanks, Falk!