ST. PETERSBURG, Fla. — Trial opened Monday in Florida’s opioid epidemic lawsuit against the Walgreens pharmacy chain, which state officials accuse of prioritizing profits over health by improperly dispensing millions of powerful painkillers that caused tens of thousands of deaths.The trial, in Pasco County north of Tampa, comes after other defendants in the Florida lawsuit including the CVS drug store chain settled for an estimated $870 million. The state could seek similar massive damages from Walgreens in the …