The sun is Orazio “Raz” Maimone’s silent partner. Both were on the job Wednesday afternoon. The star provided 85 degrees worth of summer heat in the Capital Region. Maimone provided Bomb Pops, Cyclones, Tear Jerkers and about 50 other kinds of flavored ices and cold creams to young clients. Maimone, 48, is “Mr. Ding-A-Ling” — the ice cream man. Kids know when Raz is on the way to their homes in Niskayuna; his white truck plays the perky “Music Box Dancer” tune during its slow prowls up and down tree-lined streets.