While much of the comedy world was busy roasting Kevin Hart in Los Angeles Sunday night, Seth Meyers found himself roasting CBS at a special Monday morning gig at an NBCUniversal upfront event in New York City.  Meyers was, of course, doing some classic company man work by taking jabs at one of NBC ’s major network rivals. But these days, CBS-based material is also squarely in Meyers’ wheelhouse due to the many Trump-friendly changes made there after David Ellison’s Skydance merged with CBS’