SAN DIEGO — Developments in the Midwest went the San Diego Padres’ way Thursday. A playoff berth is creeping up on them. But the plastic and champagne and goggles will remain in storage at least one more day, as the Padres could not beat the team they will eventually need to win a series against if their season is to be truly successful. The Los Angeles Dodgers beat the Padres 5-2 Thursday night at Petco Park, taking their ninth consecutive series between the teams and putting off any celebration in the home clubhouse until at least Saturday. Before play began in San Diego, the Phillies lost i…