[O2-5295] DPL Analysis: add tf-offset option to mctracks-to-aod converter

[aalkin]

Introduces --tf-offset N option that makes TF numbers start from N+1. This is consistent with a convention that TFNumber message is provided by the AOD source in a workflow.

• Remove unnecessary printout (info -> debug)
• Remove unnecessary data member (configurable can be used directly)
• Make sure the empty TF for inconsistent input is counted to prevent workflow from getting stuck

[github-actions]

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