Update Piezo Capacitance OPIs
OPIs were copied from DMCS repository (https://gitlab.esss.lu.se/kacperklys/e3-piezocapacitance) and slightly modified to work in engineer-ts2.
OPIs were copied from DMCS repository (https://gitlab.esss.lu.se/kacperklys/e3-piezocapacitance) and slightly modified to work in engineer-ts2.