Add GhostPartons in PHYS

For both SM and BSM multitop analysis, we'd like to request to add GhostPartons variable to improve jet matching.

Without this variable, the purely dR-based method does not provide adequate matching performance.

Local test performance on mc23 ttbar sample, the original event size:

================================================================================
         Categorized data
================================================================================
     Disk Size         Fraction    Category Name
--------------------------------------------------------------------------------
       0.106 kb        0.003       PFO
       0.753 kb        0.018       EvtId
       0.912 kb        0.022       *Unknown*
       1.103 kb        0.026       BTag
       1.296 kb        0.031       MetaData
       1.683 kb        0.040       Muon
       2.089 kb        0.050       MET
       2.662 kb        0.063       InDet
       2.898 kb        0.069       tau
       6.285 kb        0.150       egamma
       6.321 kb        0.150       Trig
       6.878 kb        0.164       Truth
       9.040 kb        0.215       Jet
      42.025 kb        1.000       Total

and the size after adding this variable:

================================================================================
         Categorized data
================================================================================
     Disk Size         Fraction    Category Name
--------------------------------------------------------------------------------
       0.106 kb        0.003       PFO
       0.753 kb        0.018       EvtId
       0.912 kb        0.022       *Unknown*
       1.103 kb        0.026       BTag
       1.296 kb        0.031       MetaData
       1.683 kb        0.040       Muon
       2.089 kb        0.050       MET
       2.662 kb        0.063       InDet
       2.898 kb        0.069       tau
       6.285 kb        0.149       egamma
       6.321 kb        0.150       Trig
       6.878 kb        0.163       Truth
       9.199 kb        0.218       Jet
      42.183 kb        1.000       Total

tagging derivation coordinator for approval: @emmat

cc @fdeliot, @metsai, @nekumari, @pgadow and @petersk for awareness.