TRD day-1 (CFV) geometry with realistic support structure

Based on v23a, incorporating a realistic support structure of v24c.

Comparison to "trd.v23/Create_TRD_Geometry_v23a.C" the main change is the removal of function

void create_box_supports(){

and replacement of

gROOT->ProcessLine( | { ".x Create_Support_Structure.C(gGeoMan,AluminiumVolumeMediu | const TString trd_01 = "support_trd1"; "KeepingVolumeMedium)");