As an event organizer, I want the location of in person events to be optional when I enable event registration, so that I can begin registering participants for my event even if I have not finalized the location or venue for my event.
Acceptance Criteria:
- Make event location optional for in person events (when enabling or updating a registration, via either the UI or the API)
- If the user has not entered event address, add in the following text to display to participants instead: “The venue address will be made available by the organizer(s).”. This is shown on the event page and on Special:EventDetails.
