By Byron Kaye SYDNEY (Reuters) – Credit Suisse Group AG joined creditors of Greensill Capital by filing lawsuits in Australia seeking compensation from the country’s biggest insurer over the supply chain financier’s collapse, court filings showed. Local media put the total claims at A$300 million ($219 million). Insurance Australia Group Ltd (IAG) was previously named as potentially exposed to the 2021 failure of Greensill since its former unit BCC Trade Credit sold policies to Greensill, but said at the time it had no liability because it sold its share of the unit two years earlier. But laws…