Simulate Private Servers and Reserve Servers

[httpsKingPie]

https://devforum.roblox.com/t/messagingservice-emulator-solving-hacky-cross-server-messaging-test-methods/3013145/6

Relevant documentation:
https://create.roblox.com/docs/reference/engine/classes/DataModel#PrivateServerId (generate GUID the same way)
https://create.roblox.com/docs/reference/engine/classes/DataModel#PrivateServerOwnerId

Implement toggle for:
Generate Private Server
Generate Reserve Server