It only makes sense that Al Yankovic’s biopic would be a parody of biopics. So “Weird: The Al Yankovic Story” is anything but the A-Z story of the song parodist who is perhaps not technically the best but arguably went on to become the most famous accordion player in an extremely specific genre of music. Take any music biopic, whether it’s “Walk the Line,” “Bohemian Rhapsody” or “Ray,” and give it the “Weird” Al treatment, and you’ve got this absurdist, playful, self-aware send-up of the man who took a gamble and risked it all to turn “Like a Virgin” into “Like a Surgeon.” Yankovic, who co-wro…