Change AlcaPCCIntegrator params to traced

[tvami]

Discussed here
https://github.com/cms-sw/cmssw/pull/37538/files#r848720360

This issue was in the code already, but this parameter should be tracked (impacts physics). Could edm::InputTag parameter type be used directly? Also, is the nested AlcaPCCIntegratorParameters really necessary? It doesn't seem to provide any value here (but I may be missing something).

Also, if the thePCCInputTag_ is only used as an argument for consumes(), it does not have to be a member variable of the class (causing minuscule memory increase throughout the job).

https://github.com/cms-sw/cmssw/blob/78daa840cbdb6216bcca00a73004a764a8edd8d9/Calibration/LumiAlCaRecoProducers/plugins/AlcaPCCIntegrator.cc#L56-L62

[tvami]

Resolved in cms-sw/cmssw#38077