Water-Soluble Cobalt(Ii) and Copper(Ii) Complexes of 3-(5-Chloro-2-Hydroxy-3-Sulfophenylhydrazo)Pentane-2,4-Dione as Building Blocks for 3D Supramolecular Networks and Catalysts for Tempo-Mediated Aerobic Oxidation of Benzylic Alcohols