Kylie Minogue cannot be summed up easily. A three-decade career with era-defining tracks. An unmistakable aura that makes it feel like you know her. And a knack for constant reinvention that defies expectations, from “I Should Be So Lucky” to “Padam Padam.” So “Kylie,” out on Netflix Wednesday, does not try to do so. Instead, the new John Battsek docuseries (the producer behind “Beckham,” “Still: A Michael J Fox. Movie” and “Three Identical Strangers”) explores what such a life has been like