Brian Steinberg Senior TV EditorABC News is moving closer to finding a new executive producer for its flagship “Good Morning America” broadcast after a weeks-long search, according to two people familiar with the matter, a critical decision for Kim Godwin, who was named president of the Walt Disney-backed unit in April.Godwin, a former senior executive at CBS News, is said to be considering both internal and external candidates, and there is some hope her choice will become known over the next