NEW YORK — In the end, it wasn’t a last-minute smoking gun but a prosecutor insisting that evidence shows Donald Trump was aware of a scheme that his Trump Organization’s executives hatched to avoid paying personal income taxes on millions of dollars worth of company-paid perks.After telling jurors on Thursday that Trump “knew exactly what was going on” with the scheme, Assistant Manhattan District Attorney Joshua Steinglass followed up by citing trial evidence and testimony that he said made …