2021-12-02 Rec v33r4

This version uses Lbcom v33r5, LHCb v53r5, Gaudi v36r2 and LCG 101 with ROOT 6.24.06.

This version is released on master branch. Built relative to Rec v33r3, with the following changes:

Tracking | PrKalmanFilter but as a Tool!, !2539 (@gunther)
Tracking FT | Add FTTrackSelector, !2602 (@shollitt)
Monitoring Tuples | Expert Downstream Track Monitoring Algorithm, !2365 (@ggolasze)
Tuples | Add functor to access decaytreefitted particles, !2504 (@pkoppenb)

Calo | Replace deprecated ToolHandle constuctor in MergedPi0, !2606 (@chasse)
Composites Functors | Add v1::Particle compatibility layer to MASSWITHHYPOTHESES Functor, !2583 (@agilman) [#220]
Functors | Fix BPVDLS in thor, !2589 (@mengzhen)
Functors | Fix ThOr LifeTime bug, !2566 (@agilman) [#204]
Monitoring | Fix profile plots for VP, FT, UT hit monitors, !2623 (@valukash)

Tracking | New methods for PrFitNode + PrKalmanFilter as library and module, !2603 (@jkubat)
Tracking Event model | V3::Tracks compatible extrapolators, !2580 (@ausachov) [#203]
Calo Monitoring | Calo monitoring Time Alignment and 2D histograms, !2622 (@alobosal)
PID | Replace activation functions with faster versions and moving to floats in PID, !2611 (@lohenry) ⭐
Event model | Following changes of introduction of lhcbid_v, LHCb!3288, !2592 (@decianm)
Build | Fix check-formatting to use LbEnv, !2627 (@poluekt)

Tracking Event model | Adapt to consistent Track Enums and improve KalmanFilterTool, !2601 (@gunther)
Muon PID | Make MuonChi2MatchTool thread-safe, !2599 (@lmeyerga)
Calo | Changes to Calo code to prepare for DD4hep integration, !2584 (@sponce)
Calo Monitoring | Calo future digit monitor changes, !2591 (@pagarcia)
Event model Utilities | SOACollection proxy simplification, !2618 (@ahennequ)
MC checking | Modernize PrPlotFTHits and use DataHandles, !2590 (@sponce)
Build | Fix warning about unused cpp file, !2626 (@clemenci)
Build | Minor fixes/clean up to CMake configuration, !2597 (@clemenci)
Use prefix ++ for counter, !2617 (@clemenci)
Shrink the ITtrackExtrapolator interface, !2609 (@graven)
Fix: remove obsolete header files, closes #225, !2595 (@chasse) [#225]
Adapted to new LHCb TaggedBool, !2594 (@sponce)
Adapted code to non movable, non copyable counters, !2586 (@sponce)
Adapted ref files to removal of GaudiAlgorithm in LHCb packers, !2514 (@sponce)
Update References for: LHCb!3314, Run2Support!16 based on lhcb-master-mr/3124, !2613 (@lhcbsoft)