Skip constraint Jacobian rank-deficiency test when solving `MocoInverse` problems

[nickbianco]

If run after MocoInverse problems, this test will cause an exception to be thrown, since the constraint Jacobian matrix doesn't exist (i.e., no coordinates in the model):

opensim-core/OpenSim/Moco/MocoCasADiSolver/MocoCasADiSolver.cpp

Line 386 in 68b37e1

if (getProblemRep().getNumKinematicConstraintEquations() &&