The Ariana Grande–Dalton Gomez divorce case started with a “Bang Bang” — she filed first on Sept. 18 in Los Angeles Superior Court at exactly 10:21 a.m. Then, at 11:39 a.m., Gomez filed his response to her divorce filing. According to court documents obtained by ET, the “Thank U, Next” songstress cited “irreconcilable differences” as the reason…