Marc Malkin Senior Film Awards, Events & Lifestyle Editor“The Sinner” is adding Frances Fisher to the cast of the fourth season.Producer Michelle Purple told me the news Thursday night at the premiere of her and producing partner Jessica Biel’s latest project “Cruel Summer.” She’s “super excited” about the “Watchmen” actor joining the USA Network anthology series along with new addition Alice Kremelberg (“The Trial of the Chicago 7,” “Orange Is the New Black”) and returning star Bill