Sitting on your couch, remote in hand, you could select a drama about a bullying, obscenely affluent family that is riven by internal strife but revels in asserting its wealth and power, even if people die. Or you can watch “Succession.”Unlike that HBO show, Hulu’s new eight-part series “Dopesick” doesn’t offer laughs at the outlandish behavior of its titans of industry. But the bigger distinction is that “Dopesick,” while a scripted drama, is about a real-life family’s alleged role in creating one of the biggest public health catastrophes in American history