combine pneumatic air demand with and without retarder into single field, rename properties, rename class and interface

remove bus database, remove unused signals (alternator), cleeanup comments, remove derivedcompressortype, use enum for compressortype

refactoring aaux: separate reading/writing data from model parameters - introduce reader classes, separate default values, only use minimal set of model parameters (don't serialize whole classes), make testcases run again

refactoring hvac tech benefits: adding separate reader, adding data to declaration resource, adapt testcase, cleanup no longer needed things. testcases OK

Merge branch 'feature/VECTO-1190-declaration-mode-for-heavy-buses' of https://webgate.ec.europa.eu/CITnet/stash/scm/~emquarima/vecto-dev into feature/VECTO-1190-declaration-mode-for-heavy-buses

# Conflicts:
#	VectoCore/VectoCore/Models/BusAuxiliaries/DownstreamModules/Impl/Electrics/Alternator.cs

update data binding for aaux forms - add conversion from/to si; rename properties: remove unit suffix