🚸 Enable G92.9 with rotational axes (#26174)

- Supporting axes that can rotate forever.

Marlin/src/module/motion.cpp

@@ -1153,10 +1153,13 @@ float get_move_distance(const xyze_pos_t &diff OPTARG(HAS_ROTATIONAL_AXES, bool
 
       #if HAS_ROTATIONAL_AXES
         if (UNEAR_ZERO(distance_sqr)) {
-          // Move involves only rotational axes. Calculate angular distance in accordance with LinuxCNC
-          is_cartesian_move = false;
+          // Move involves no linear axes. Calculate angular distance in accordance with LinuxCNC
           distance_sqr = ROTATIONAL_AXIS_GANG(sq(diff.i), + sq(diff.j), + sq(diff.k), + sq(diff.u), + sq(diff.v), + sq(diff.w));
         }
+        if (!UNEAR_ZERO(distance_sqr)) {
+          // Move involves rotational axes, not just the extruder
+          is_cartesian_move = false;
+        }
       #endif
 
     #endif