A new Apple job posting suggests that the company may be planning to offer a version of the iPhone on Sprint. Stop it, AT&T reports on a new job posting for a Carrier Engineer based in Kansas City, MO, who would be part of a team “that supports taking products through technical approval at the carriers.” As noted in the report, Sprint’s headquarters in in Overland Park, KS, a suburb of Kansas City. Interestingly, the posting…