MSNBC host Ari Melber trumpeted a taped prison interview with former Stormy Daniels attorney Michael Avenatti that aired on “The Beat with Ari Melber” on Tuesday night, then allowed the convicted attorney to smear former Donald Trump attorney Michael Cohen — with little pushback and without Cohen in studio. Avenatti, convicted of stealing money from Daniels and another client and for extorting Nike, was given a microphone to assail Cohen’s character while insisting that the hush money case being brought against Trump next week was problematic — although Avenatti said he believed Trump would be…