Fixed CL Mode for incompressible solver (RANS)

[juanrasinesmazo]

Is your feature request related to a problem? Please describe.
The fixed lift coefficient mode (FIXED_CL_MODE) available for the compressible RANS solver is particularly useful for certain aerodynamic flight condition evaluations. I noticed this feature is not implemented for the incompressible RANS solver. As far I could find, there is no information regarding a feature request for this capability.

Describe the solution you'd like
How difficult, if possible, would it be to implement the fixed lift coefficient mode for the incompressible RANS solver? Is there a particular reason why it was implemented in the compressible solver only?

Describe alternatives you've considered
By the looks of CEulerSolver::FixedCL_Convergence(), the implementation appears straight forward. If this feature is not likely to be added to SU2 in the future, could some guidance on how to implement it ourselves be given? Specifically what functions/ where to look to port over to the incompressible solver.

Thanks for your consideration,

Juan