Update forward models to use the new autoscaling option of Everest

[verveerpj]

This issue can be resolved when the following issues are resolved in ERT/Everest:

• Handle autoscaling of controls in Everest ert#9835
• Handling of auto-scaled controls in forward models ert#8814

This sets up the conditions for using auto-scaling in the forward models. Currently, models must assume that the controls, provided via JSON files, may be scaled and their configuration must provide information to rescale them. If auto-scaling is enabled in Everest, it will write for each control an additional JSON file with rescaled values, that can be used instead, and additional rescaling is not necessary. The forward models must be adapted to make use of these feature by checking if the additional file(s) exist and take advantage of them.

The forward models should be checked to see if they can be adapted. These include at least:

• well_constraints
• well_trajectory

and possibly others.