[Clubs] Allow Privacy Change From Front End

I would like to allow my community members to change the privacy settings of their clubs without relying on administrator intervention.

I don't think this is necessarily something that needs to be controlled per group, so just a Yes/No option in Club settings controlling "Can users change own club's privacy settings" or something similar should be sufficient.

Example use case: I create a Private club because I do not want others interacting or creating content while I'm setting up the initial layout and publishing initial content. When it is ready, I want to change the privacy to Public or Open to allow users to see and interact with my club.