PARIS (Reuters) -French retailer Casino has received three preliminary offers for its renewable-energy business GreenYellow, with bids around 1.5 billion euros ($1.60 billion) each, a source with knowledge of the matter said on Tuesday. Macquarie I Squared Capital and Dutch company SHV had made preliminary offers as of June 2, the source said, adding that other potential bidders had asked for more time to put together a possible offer. BFM TV earlier on Tuesday said GreenYellow had not attracted much interest from potential buyers in the French energy sector, hitting Casino shares in early tra…