WEST PALM BEACH, Fla. — Mark Burnett, the power producer who helped reintroduce Donald Trump to a national television audience with The Apprentice, is being tapped by the president-elect as special envoy to the United Kingdom in his upcoming administration. “With a distinguished career in television production and business, Mark brings a unique blend of diplomatic acumen and international recognition to this important role,” Trump announced Saturday. Burnett, who was born in London, helped produce hits like Survivor and The Voice, but is perhaps best known for teaming up with Trump for The Apprentice, which first aired on NBC in