Pixel bichsel PU master

Following the observation that standard and full PU-truth configurations yield different results in digitisation for ITk in 21.9 [ATLITKSW-154], this MR disables the use of the Bichsel model for PU particles, which relies on truth information, to get a consistent behaviour, consistently with !42791 (merged)

FYI @nstyles @stsuno @tlari @battagl

InnerDetector/InDetDigitization/PixelDigitization/python/PixelDigitizationConfig.py

@@ -46,7 +46,7 @@ def EnergyDepositionTool(name="EnergyDepositionTool", **kwargs):
     kwargs.setdefault("doBichsel", hasattr(digitizationFlags, "doBichselSimulation") and digitizationFlags.doBichselSimulation())
     kwargs.setdefault("doBichselBetaGammaCut", 0.7)   # dEdx not quite consistent below this
     kwargs.setdefault("doDeltaRay", False)            # needs validation
-    kwargs.setdefault("doPU", True)
+    kwargs.setdefault("doPU", False)
     return CfgMgr.EnergyDepositionTool(name, **kwargs)
 
 def SensorSimPlanarTool(name="SensorSimPlanarTool", **kwargs):