use G4 10.7 version of LogicalBorderSurface on a G4 10.6 baseline

Ciao @gcorti this is the draft MR we have been discussing. It uses the G4 10.7 version of LogicalBorderSurface on the current master using the G4 10.6 baseline. My patch was off tag v10r6p2t6 but I realised that this is identical to the current master, so this is a MR against master. I only tested that it builds (in the ARM build) and that Gauss was then also building (but it needed a rebuild). Let's see if this works and if it gives any performance benefit... Thanks Andrea