Adjustable BLTouch/3DTouch mount for Re-D-Bot

The mount from aleknest has been redone to make it capable to adjust the distance between the bottom plane of the sensor and the bed.
Installation:
1) Use the M3 countersunk screw to install the fixed part of the mount on the carriage.
2) Use two M3 screws and self-locking nuts to secure the sensor on the moving part.
3) Set the required distance from the lower plane of the sensor to the surface of the table on the caliper. According to the 3D Touch manual, it should be 8.3 mm. Lock the cali