Draft: Propagation of changes in AFP simulation and reconstruction to rel. 22
Propagation of changes introduced in !44058 for rel. 21 into rel. 22.
This includes changes in detector description (AFP_GeoModel, AFP_Geometry); introduction of AFP hit clusters (AFP_SiClusterTools); and rewritten AFP track reconstruction (AFP_LocReco, AFP_GlobalRecoTools). The clustering and track reconstruction were separated (in contract with !44058).
Also, this MR addresses issues raised in AFPSOFT-125.