Daniel D'Addario Chief TV CriticFox has lately made its name, and its success, on televised music competitions — everything from “The Masked Singer” and “Dancer” franchises to a revived “Name That Tune” to the amiably strange “I Can See Your Voice.” And so it makes a certain kind of sense that this fall, it launches a new scripted series about … the inner workings of a reality-TV contest.On “The Big Leap,” various Detroit residents are wooed by a series of the same name, one that aims to find