Professional Kim Kardashian hanger-on Jonathan Cheban wants to be known as more than, well, a professional Kim Kardashian hanger-on. So, he’s trying acting…in a movie about a reality star who gets kidnapped and held for ransom. A reality star who gets kidnapped? That sounds very close to something that happened in real life, but we’re sure Jonathan thought of it by himself. In By Any Means , Jonathan, 43 — a former publicist — plays the kidnapped star’s agent, who acts as a liaison between the kidnapper and the press. What range! We expect Jonathan will next tackle even more demanding roles, like the agent of a reality star whose stepfather transitions, or the agent of a reality star who marries a rapper with mental problems, or…