It looked like a home run. Sounded like a home run. Heliot Ramos thought it was gone . So did the Giants’ broadcasters. Somehow, it landed in Cedric Mullins’ glove, leaving Ramos slack jawed and leading to two ejections from the visitors’ dugout. Even home runs off the bat aren’t getting over the wall these days for the Giants, who haven’t hit one since they left San Francisco six days ago. Ramos appeared to connect on their first dinger of their road trip in the second inning Saturday against Rays opener Griffin Jax. He squared up a 3-2 fastball to straightaway center field, sending Mullins back to the warning track. It looked like a home run. Sounded like a home run. Heliot Ramos thought it was gone. So did the Giants’ broadcasters.…