Redesign update & delete

[DerAndereAndi]

The current implementations requires lots of code duplications with minor adjustments which is error prone. Also it requires one hash key and does not allow different selectors, e.g. for electricalConnectionParameterDescriptionListData, to be used.

We should find a way to implement this in a generic way and define selectors e.g. using tags and correlations between filter selectors and datatypes e.g. using mapping constructs as done with functions and data types.

[DerAndereAndi]

I don't see a way to implement this in a generic way, as reflections won't provide the actual type as it only provides the underlying core type.

Hence the approach is to implement a generator that generates the code for all model types that require this.

[DerAndereAndi]

This is implemented, found a mostly generic approach that works.