controlsd: 5-state ScreenDisplayMode machine + park->drive auto-wake

Replaces the 3-state cycle in clearpilot_state_control with broken's
5-state machine:
- Onroad (drive gear): 0→4, 1→2, 2→3, 3→4, 4→2 (auto modes never
  reached via the button — gpsd's day/night calc is the only path back)
- Not in drive: anything except 3 → 3 (screen off), state 3 → 0 (auto)

Also tracks park→drive edge to auto-wake from screen-off (mode 3 → 0)
when shifting into drive, regardless of how the screen got turned off.

Speed/cruise overlay state intentionally left out — owned by
speed_logicd, not controlsd.

events.py: remove clp_debug_notice + EventName.clpDebug binding
(no more "Clearpilot Debug Function Executed (N)" on-screen message).
The dead commented-out events.add(EventName.clpDebug) and stray print
of buttonEvents in controlsd are also cleaned up.

selfdrive/controls/lib/events.py

@@ -262,16 +262,6 @@ def calibration_incomplete_alert(CP: car.CarParams, CS: car.CarState, sm: messag
     AlertStatus.normal, AlertSize.mid,
     Priority.LOWEST, VisualAlert.none, AudibleAlert.none, .2)
 
-def clp_debug_notice(CP: car.CarParams, CS: car.CarState, sm: messaging.SubMaster, metric: bool, soft_disable_time: int) -> Alert:
-  if not hasattr(clp_debug_notice, "counter"):
-    clp_debug_notice.counter = 0  
-  clp_debug_notice.counter += 1 
-  return Alert(
-    f"Clearpilot Debug Function Executed ({clp_debug_notice.counter})",
-    "",
-    AlertStatus.normal, AlertSize.small,
-    Priority.LOWER, VisualAlert.none, AudibleAlert.none, 3.0)
-
 
 def no_gps_alert(CP: car.CarParams, CS: car.CarState, sm: messaging.SubMaster, metric: bool, soft_disable_time: int) -> Alert:
   # Clearpilot todo:
@@ -778,10 +768,6 @@ EVENTS: dict[int, dict[str, Alert | AlertCallbackType]] = {
     ET.SOFT_DISABLE: soft_disable_alert("Sensor Data Invalid"),
   },
 
-  EventName.clpDebug: {
-    ET.PERMANENT: clp_debug_notice,
-  },
-
   EventName.noGps: {
     ET.PERMANENT: no_gps_alert,
   },