Update ISF_MainConfig.py: ATLFASTIIF_G4MS configuration

• Let Fatras handle muons in the calorimeters when Fatras is used for simulations in Inner Detector
• Use ISF_DefaultFastCaloSimSelector for calorimeters

This addresses some discrepancies seen in comparisons of observables between ATLFASTII(the current benchmark simulator for fastsim) and ATLFASTIIF_G4MS (Fatras in ID + legacy FastCaloSim + Geant4 in MS) simulations.

Closes ATLASSIM-4566

added 21.3 Simulation + 1 deleted label

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• 68ef786d - Update ISF_MainConfig.py: ATLFASTIIF_G4MS configuration

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• Simulation/ISF/ISF_Config

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picked the changes into the branch cherry-pick-18f2e92821-master with commit 72e84dbc

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