Draft: Functor Collector with RecSummary information

Added RecSummary() Functor Collector to Analysis/Phys/FunTuple/python/FunTuple/functorcollections.py. It retrieves an event-level collection of RecSummary information.

It creates the following branches:

• nTracks,
• nPVs
• nFTClusters
• nVPClusters
• nEcalClusters
• eCalTot
• hCalTot
• nVeloTracks
• nLongTracks
• nDownstreamTracks
• nUpstreamTracks
• nBackTracks
• nRich1Hits
• nRich2Hits

Work towards DPA task https://gitlab.cern.ch/lhcb-dpa/project/-/issues/178.