extruder: Add a SET_EXTRUDER_ROTATION_DISTANCE command

Support altering the extruder distance using the higher-level
rotation_distance.  This is in preparation for removal of the
SET_EXTRUDER_STEP_DISTANCE command.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/endstop_phase.py

@@ -54,7 +54,8 @@ class EndstopPhase:
         self.name = config.get_name().split()[1]
         # Obtain step_distance and microsteps from stepper config section
         sconfig = config.getsection(self.name)
-        self.step_dist = stepper.parse_step_distance(sconfig)
+        rotation_dist, steps_per_rotation = stepper.parse_step_distance(sconfig)
+        self.step_dist = rotation_dist / steps_per_rotation
         self.phases = sconfig.getint("microsteps", note_valid=False) * 4
         self.phase_calc = PhaseCalc(self.printer, self.name, self.phases)
         # Register event handlers