Print constraint values using linear solver model builder

[arnabadas]

What language and solver does this apply to?
Python, Linear Solver Model Builder (SCIP/SAT, should be applicable to other backends as well)

Describe the problem you are trying to solve.
A simple linear integer programming problem

Describe the solution you'd like
Get value of the constraint from the solver API without computing it again

Describe alternatives you've considered
In case of the basic linear_solver api, I use ComputeConstraintActivities to print the constraint values. But there is no such option in the modelsolver API of the linear solver model builder.

[lperron]

Implemented on main.

python: solver.activity(ct)
java: solver.getActivity(ct)