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TrigEgam: Factorizing fast electron step to get rid of fastTrack dependency in idperf chains

Debottam Bakshi Gupta requested to merge dbakshig/athena:factorizingFastElectronStep_1 into 22.0

I am continuing from !54997 (closed) with a fresh narrative As discussed in ATR-25499 and ATR-25865 to keep the Fast step of electron independent of FastTracks for idperf chains in this MR we factorized fast electron step as following, for Nominal electron the sequence will look like

FastCalo
 |
 V
FastTrack
 |
 V
FastElectron
 |
 V
PrecisionCalo
 |
 V
PrecisionTracking
 |
 V
GSFRefit
 |
 V
PrecisionElectron

and idperf will look like

FastCalo
 |
 V
FastTrack
 |
 V
Empty 
 |
 V
PrecisionCalo
 |
 V
PrecisionTracking
 |
 V
GSFRefit

Apologies for the delays on this development as we wanted to conclude some core structure of our Electron chains. We will take a bit (shouldn't be long) to validate this MR as we will see some intermediate count/feature changes of electron chains. Adding @safarzad , @cjmeyer , @fernando

Edited by Debottam Bakshi Gupta

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