Provide dr_cycle_reduction_maxiter option

Currrently, max_it in https://git.dynare.org/Dynare/dynare/-/blob/master/mex/sources/cycle_reduction/mexFunction.f08?ref_type=heads is hard-coded to 300. It should be an option as in https://git.dynare.org/Dynare/dynare/-/tree/master/mex/sources/logarithmic_reduction?ref_type=heads