All roads lead to LeAnn Rimes at “CMT Crossroads: LeAnn Rimes & Friends,” which will premiere 8 p.m. (ET) Thursday on CMT. Carly Pearce, Brandy Clark, Ashley McBryde and Mickey Guyton teamed for a night of music honoring Rimes. The women collaborated to sing Rimes’ biggest hits for an evening that she calls “surreal.” “It……