Add a scaling option for objectives

[verveerpj]

Is your feature request related to a problem? Please describe.
In the Everest configuration a normalization factor can be specified. Objectives will be normalized by multiplying with this factor during optimization. Instead of a normalization factor a scaling factor should be used, which divides the objectives. This is more natural, since we usually want to reduce large objective values to a value close to one. It is also more inline with controls and constraints that offer a scaling option.

Describe the solution you'd like
A scaling option should be added which could be used instead of normalization. The normalization option should be deprecated and in the long run, it should be removed.

Describe alternatives you've considered
N/A

Additional context
Internally the ropt optimizer already expects scaling rather than normalization, hence implementation should be straightforward.