The Fenix has rizen! This Sunday evening, Tenacious D – the comedy/rock duo of Jack Black and Kyle Gass – is up for a Grammy Award for Best Comedy Album.  The Tenacious team’s Rize of the Fenix  is facing stand-up competition from such acts as Jim Gaffigan, Kathy Griffin, Lewis Black, Margaret Cho and Jimmy Fallon, the latter of whom also mixed comedy and rock to great effect on his nominated album.  But Tenacious D is looking back as well as forward.  On March 5, Epic Records and Legacy Recordings will unveil…