Convert all upscaling programs to new pinch behaviour.

This means that PINCH must be used in the input deck, whereas before, z_tolerance was available as a program parameter (but only for some programs). A benefit is that all programs will now uniformly accept PINCH in the input decks.

If you use the z_tolerance parameter in a program that used to accept it, you will get a warning.

Requires OPM/dune-cornerpoint#104 and OPM/opm-porsol#111.