Brad Pitt ran into Angelina Jolie’s father and brother during a low-key date night with his new girlfriend over the weekend, RadarOnline.com has learned. In an awkward development to come as Pitt, 60, and Jolie, 48, remain in the throes of their ugly and ongoing divorce battle, the Bullet Train star reportedly ran into his ex’s father, actor Jon Voight, and brother, James Haven, in Los Angeles on Friday night. According to the Sun, Pitt and his new girlfriend, Ines de Ramon, attended an art show for director Bennett Miller at the Gagosian Gallery in Beverly Hills when they came face-to-face wi…