2021-10-22 Phys v33r3

This version uses Rec v33r3, Lbcom v33r4, LHCb v53r4, Gaudi v36r2 and LCG 101 with ROOT 6.24.06.

This version is released on master branch. Built relative to Phys v33r2, with the following changes:

New features new feature

• Functors | Add SubCombination functionality into ParticleCombination, !992 (@nnolte)

Enhancements enhancement

• Functors Monitoring | Implement a ThOr functor-based monitoring, !997 (@mramospe)
• Implement a thread-safe particle container merger., !994 (@lmeyerga)

Code cleanups and changes to tests modernisation cleanup testing

• Fix typos, !1000 (@nnolte)