API_GetTicketData should be 6 different endpoints

[wescopeland]

Currently, API_GetTicketData has the following routines:

• Get details for a specific ticket by ticket ID
• Get open tickets ordered by most recent
• Get games with the most open tickets
• Get ticket statistics for a specific user by username
• Get ticket statistics for a specific game by game ID
• Get ticket statistics for a specific achievement by achievement ID

This should be done in a way that isn't a breaking change, so maybe detect the legacy query params and fall through to the new endpoint code. Ideally, API_GetTicketData's primary job is to satisfy the "get details for a specific ticket" use case.