Introduce a machine readable description for parameter distribution values

Describe the feature

When defining parameter value distributions sometimes the parameter name and its' value don't give the full information about what has been tested. One example is if you have a road with multiple different curvatures and need to vary the start position of your ego vehicle to test different curvatures. Then the parameter is the start position and the information about the curvature is lost in the post-run logs.

Describe the solution you would like

If an optional property for a description of parameter values could be added, this could hold the information about specific parameter values. For example the "DistributionSetElement" Class could have a "description" property additional to the "value" property.

Describe alternatives you have considered

None.

Describe the backwards compatibility

Yes, only adding an optional attribute.

Additional context

None.