Leah McSweeney has leaned on OnlyFans after nailing her Bravo coffin shut by filing an explosive lawsuit with shocking allegations against the network, Andy Cohen, and more. McSweeney — who claimed she had to be institutionalized in a psychiatric facility because of the alleged hostile work environment on The Real Housewives Of New York— teamed up with Sopranos sex pot Drea de Matteo on the risqué paid subscription site, RadarOnline.com has learned. McSweeney posted two of the images to her Instagram on Monday. The 41-year-old proved she doesn’t care what others think by stripping to her linge…