After an absence of more than two decades, during which time she established an illustrious career in motion pictures, including an Academy Award nomination for her portrayal of the troubled Pat Nixon in Oliver Stone’s 1995 film “Nixon,” Steppenwolf Company member Joan Allen has returned to her theatrical roots in Chicago to star in the American premiere of playwright Zinnie Harris’ “The Wheel,” currently running through Nov. 10 on the main stage of Steppenwolf Theatre at 1650 N …