Draft: Clean up digi for ITk pixel

This MR is for ITK Pixel digitisation update. It aims to do multiple simple things:

• Stop treating all sensors as planar but run 3D sensors in the 3D part of the code (this is a dummy implementation for now - just using the non-ITk code)
• The PLRs are explicitely disabled for now in 3D
• Remove the global isITk variable
• For the Planar sensor digi code, update the number of layers to 4 from 5 and adjust the reading of the correct histograms for the template correction for the radiation damage simulation

Note that I could not see a single module that passed Module.isPLR() condition in the digitisation code. Are there no hits in PLR simulated?

I tested the changes with (Run4):

#!/bin/bash


if [ -z ${ATLAS_REFERENCE_DATA+x} ]; then
  ATLAS_REFERENCE_DATA="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art"
fi

Events=2
HSHitsFile="${ATLAS_REFERENCE_DATA}/PhaseIIUpgrade/HITS/ATLAS-P2-RUN4-03-00-00/mc21_14TeV.601229.PhPy8EG_A14_ttbar_hdamp258p75_SingleLep.simul.HITS.e8481_s4149/HITS.33605501._000106.pool.root.1"
HighPtMinbiasHitsFiles="${ATLAS_REFERENCE_DATA}/PhaseIIUpgrade/HITS/ATLAS-P2-RUN4-03-00-00/mc21_14TeV.800831.Py8EG_minbias_inelastic_highjetphotonlepton.merge.HITS.e8481_s4149_s4150/*"
LowPtMinbiasHitsFiles="${ATLAS_REFERENCE_DATA}/PhaseIIUpgrade/HITS/ATLAS-P2-RUN4-03-00-00/mc21_14TeV.900311.Epos_minbias_inelastic_lowjetphoton.merge.HITS.e8481_s4149_s4150/*"
DigiOutFileName="RUN4_ttbar.mu200.RDO.pool.root"
Digi_tf.py \
--CA \
--conditionsTag default:OFLCOND-MC15c-SDR-14-05 \
--detectors ITkPixel \
--digiSeedOffset1 170 --digiSeedOffset2 170 \
--digiSteeringConf 'StandardSignalOnlyTruth' \
--inputHITSFile ${HSHitsFile} \
--inputHighPtMinbiasHitsFile ${HighPtMinbiasHitsFiles} \
--inputLowPtMinbiasHitsFile ${LowPtMinbiasHitsFiles} \
--jobNumber 568 \
--maxEvents ${Events} \
--outputRDOFile ${DigiOutFileName} \
--preInclude 'HITtoRDO:Campaigns.PhaseIIPileUp200' \
--postInclude 'PyJobTransforms.UseFrontier' \
--skipEvents 0

and (Run 2):

#!/bin/bash

Events=2
DigiOutFileName="mc20e_ttbar.RDO.pool.root"
HSHitsFile="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/Tier0ChainTests/valid1.410000.PowhegPythiaEvtGen_P2012_ttbar_hdamp172p5_nonallhad.simul.HITS.e4993_s3091/HITS.10504490._000425.pool.root.1"
HighPtMinbiasHitsFiles="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/Tier0ChainTests/mc16_13TeV.800831.Py8EG_minbias_inelastic_highjetphotonlepton.simul.HITS_FILT.e8341_s3687_s3704/*"
LowPtMinbiasHitsFiles="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/Tier0ChainTests/mc16_13TeV.900311.Epos_minbias_inelastic_lowjetphoton.simul.HITS_FILT.e8341_s3687_s3704/*"
Digi_tf.py \
    --CA \
    --conditionsTag default:OFLCOND-MC16-SDR-RUN2-09 \
    --digiSeedOffset1 170 --digiSeedOffset2 170 \
    --digiSteeringConf 'StandardSignalOnlyTruth' \
    --geometryVersion default:ATLAS-R2-2016-01-00-01 \
    --inputHITSFile ${HSHitsFile} \
    --inputHighPtMinbiasHitsFile ${HighPtMinbiasHitsFiles} \
    --inputLowPtMinbiasHitsFile ${LowPtMinbiasHitsFiles} \
    --jobNumber 568 \
    --maxEvents ${Events} \
    --outputRDOFile ${DigiOutFileName} \
    --postInclude 'PyJobTransforms.UseFrontier' 'HITtoRDO:DigitizationConfig.DigitizationSteering.DigitizationTestingPostInclude' \
    --preInclude 'HITtoRDO:Campaigns.MC20e' \
    --skipEvents 0

Tagging the experts @mbomben @kiabelin @nstyles @sroe @spagan @gemmec