WIP: Remove reinitialize flag

The reinitialize flag is unused in the steppers. It's purpose to allow the storage of the Jacobian from a certain point (from the last reinitialize call, wherever this might have been) up to the current position. However it became deprecated since the Jacobian is passed at each call of boundState of curvilinearState. So instead of receiving a Jacobian from any position to the current it is easier to always get the one from the last transport and accumulate them if needed.