Can Andy Cohen get to the bottom of this? The Bravo head honcho wasn’t convinced Kate Middleton was out and about over the weekend — even after a video allegedly showcasing Prince William and his wife strolling around a local farm stand was released to the public. “That ain’t Kate…” Cohen posted to X (formerly named Twitter) on Monday, March 18, following emergence of the suspicious footage. Some social media users sided with The Real Housewives executive producer, as one person replied, “I just want to know who they think they’re fooling,” while another added, “I don’t understand why they kee…