#1506 Separate time schemes for the penalization law used by the QuasiIncompressibleSecondPiolaKirchhoffStressTensor.
We want to have different time schemes for the deviatoric part (hyperelasticity, viscoelasticity and internal variable) and the volumetric part (penalization of the incompressibility). This means that for the pressure part of the residual, the cauchy green used in the penalization law cannot be the one inherited from the SecondPiolaKirchhoffStressTensor operator. We need two different state_previous_iteration: one for the displacement only (which will be expressed at the midpoint in most of the dynamic cases) and one which contains both displacement and hydrostatic pressure (which should only be evaluated at n+1).