Replace player title and population static data with request to config.psynet.gg

[Jackenmen]

The following endpoint contains the required information (the current static data was extracted from the game which got that information from this endpoint):

https://config.psynet.gg/v2/Config/BattleCars/:buildId/Prod/Steam/INT/

where the :buildId has to be some build number. Presumably, the API returns a response that can be handled by the specific game build. The responses for a current build at the time of writing the issue (-691922347) vs a 4-year-old build number (-1811840530) are identical, so this should be pretty stable.

The build ID, as well as the endpoint URL, can be found in the game's log file (%USERPROFILE%\Documents\My Games\Rocket League\TAGame\Logs\Launch.log).

[Jackenmen]

There are a couple of other things that could be potentially added using this endpoint:

• player title colors (Consider exposing player title colors #104)
• current season number (UIConfig_TA class)
• available playlist regions (RegionConfig_X)
• map sets (MapsConfig_TA)