It’s late August in Albuquerque, and the “Better Call Saul” crew is relieved to have an indoor shoot day. All summer, the production has been plagued by freak lightning storms, causing unpredictable scheduling setbacks.The high-altitude desert climate is hard enough to handle, with soaring temperatures that lead to dehydration; there’s also the occasional determined paparazzo. Aside from series star Bob Odenkirk, who’s in nearly every scene, the production’s medic might be the busiest guy on set, constantly reminding everyone to drink water and apply sunscreen.So today’s location shoot, though a bit cramped, has everyone smiling — as, likely, will be “Breaking Bad” fans when they get to see it. It’s Loyola’s Diner — yes, that diner, where we see Mike Ehrmantraut (Jonathan Banks) and the ever-so-charming Lydia (Laura Fraser) first meet.