A Klipper Extension for the Probe Obj that allows the first probe sample to be discarded from the following command: PROBE,PROBE_ACCURACY,PROBE_CALIBRATE,QUAD_GANTRY_LEVEL,BED_MESH_CALIBRATE,SCREWS_TILT_CALCULATE,Z_TILT_ADJUST,PROBE_Z_ACCURACY, and CALIBRATE_Z
