Eight years, countless unusually named nightclubs and a “human roomba” later, Invoice Hader sayshe would not think Stefon shall be back any time quickly.The “Saturday Night time Live” actor announced previous this month that the season 38 finale of ‘SNL’ could be his laston the show, and he sat down with Willie Geist and Megan Colarossi to talk about Hader’s fan-favorite personality.Willie: So how does it feel to …