Actor Jeff Bridges has been nominated for an Oscar seven times and won once, but he has avoided television series like the plague. Bridges has surrendered at last, as he’s starring in the miniseries “The Old Man,” premiering on FX Thursday. He plays an ex-renegade CIA operative who has retired in obscurity until an assassin shows up to take him out. “I have a lot of resistance, man,” says Bridges of his reluctance to undertake the series challenge. “Sometimes it’s a lot of fun, but I think the difficulty comes in the challenge to do justice to all the opportunities you’ve been given. And hopef…