MILAN (Reuters) – Italian insurer Generali has held informal deal talks with Guggenheim Partners on a range of options including a full acquisition of the U.S. investment firm’s asset management business, Bloomberg News reported on Friday, citing sources. The options also include a partnership or a strategic investment in Guggenheim, and are intended to bolster the Italian company’s asset management business, the report said. Under a plan unveiled in December, Generali had earmarked up to 3 billion euros ($2.9 billion) for mergers and acquisitions in insurance and asset management businesses, …