A road trip down old Route 66 led to a Wild West-style motel shootout for a pioneering CNN anchor and her former-soldier hubby. Lynne Russell — the first woman to ever solo-anchor a primetime network news show — and Chuck de Caro, 65, had stopped at a Motel 6 for the night in Albuquerque when an intruder slipped into their room as Russell went to grab something from the car around 11:30 p.m. Tuesday. “I opened the door and he materialized out of nowhere; he was inside,” she told The Post. “And he pushed me into the room and onto...