Evelyn Y. Davis’ widower is demanding an apology from Lloyd Blankfein after the former Goldman Sachs CEO slammed the shareholder activist’s newsletter as “expensive and worthless” in his new memoir. James Patterson, the fourth and final husband of the late Wall Street gadfly, ripped Blankfein for allegedly disrespecting Davis, who spent decades confronting corporate power — including Blankfein himself. “Blankfein made a disrespectful comment about my late wife,” Patterson wrote in an email to The Post. Patterson noted that Blankfein’s book “Streetwise: Getting to and Through Goldman Sachs,” released March 3 by Penguin Press, described Davis as a “relentless and...