gyro sensors/debug: standardize gyro debugging enum elements

* will require coordination with BFC of course.
* rationale: previously `DEBUG_GYRO_NOTCH` debugging was used to grab the
  scaled, unfiltered gyro readings, prior to the FFT running. This has been
  updated to `DEBUG_GYRO_SCALED`.

  similarly, `DEBUG_GYRO` debugging was used to record the filtered gyro. This
  is updated to `GYRO_FILTERED`.

  interestingly, `DEBUG_GYRO` was also used for movement threshold calibration.
  This has been updated to be `DEBUG_GYRO_CALIBRATION` and also now stores
  per-axis standard deviation.

  Application of filter position moved slightly for logical grouping, has no
  effect due to LTI.

src/main/build/debug.h

@@ -52,10 +52,10 @@ typedef enum {
     DEBUG_NONE,
     DEBUG_CYCLETIME,
     DEBUG_BATTERY,
-    DEBUG_GYRO,
+    DEBUG_GYRO_FILTERED,
     DEBUG_ACCELEROMETER,
     DEBUG_PIDLOOP,
-    DEBUG_GYRO_NOTCH,
+    DEBUG_GYRO_SCALED,
     DEBUG_RC_INTERPOLATION,
     DEBUG_ANGLERATE,
     DEBUG_ESC_SENSOR,