GM: add hysteresis to cluster speed (#27301)

* add cluster hysteresis

* Update ref_commit

selfdrive/car/gm/carstate.py

@@ -17,6 +17,9 @@ class CarState(CarStateBase):
     super().__init__(CP)
     can_define = CANDefine(DBC[CP.carFingerprint]["pt"])
     self.shifter_values = can_define.dv["ECMPRDNL2"]["PRNDL2"]
+    self.cluster_speed_hyst_gap = CV.KPH_TO_MS / 2.
+    self.cluster_min_speed = CV.KPH_TO_MS / 2.
+
     self.loopback_lka_steering_cmd_updated = False
     self.loopback_lka_steering_cmd_ts_nanos = 0
     self.pt_lka_steering_cmd_counter = 0

selfdrive/test/process_replay/ref_commit

@@ -1 +1 @@
-9c5d75e9255a5a19d28f4317c382f00f4bc0ac61
+fbf92051507b7a7585907b58baadec6b8cc475af