[PWGLF,PWGMM] mftReassociationValidation.cxx : add features, rename some plots

[AlexianL]

In this PR, I added :

• A cut on true tracks (with the McMask)
• A cut to remove split vertices
• An explicit cut on orphan tracks (even though they should be removed by definition)
• Added a plot comparing ambDegree and compatibleCollIds.size
• Added a precise track selection plot
• Added the option to use only primary particle, only secondary particle and both
• Added MFT track DCAxy and DCAz cut (with the z-vertex shift correction)
• Added MFT track algorithm cut, allowing to choose only CA, only LTF or both
• Plots of the DCA distribution w.r.t to the status of the track (MC matched or not)
• A correction on some histogram names

[github-actions]

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