Noisy `TrackListMerger` from `jetCoreRegionalStepTracks` in phase2 offline reconstruction

[mmusich]

E.g. see here.
Phase-2 offline reco log are filled with:

%MSG-w TrackListMerger:  TrackListMerger:earlyGeneralTracks  18-Nov-2025 13:06:21 CET Run: 1 Event: 1
TrackCollection InputTag:  label = jetCoreRegionalStepTracks, instance =  not found
%MSG
%MSG-w TrackListMerger:  TrackListMerger:earlyGeneralTracks  18-Nov-2025 13:06:21 CET Run: 1 Event: 4
TrackCollection InputTag:  label = jetCoreRegionalStepTracks, instance =  not found
%MSG
%MSG-w TrackListMerger:  TrackListMerger:earlyGeneralTracks  18-Nov-2025 13:06:21 CET Run: 1 Event: 2
TrackCollection InputTag:  label = jetCoreRegionalStepTracks, instance =  not found
%MSG
%MSG-w TrackListMerger:  TrackListMerger:earlyGeneralTracks  18-Nov-2025 13:06:21 CET Run: 1 Event: 3
TrackCollection InputTag:  label = jetCoreRegionalStepTracks, instance =  not found
%MSG