[bot] Implement GameModeRestart(...)

* Implement `CNetGame::ShutdownForGameModeRestart()`

* Implement `CPlayerPool::Process()`

* Implement `CNetGame::ResetVehiclePool()`

* Implement `CNetGame::StopRecordingPlayback()`

bot/net/playerpool.cpp

@@ -37,3 +37,10 @@ BOOL CPlayerPool::Delete(PLAYERID playerId, BYTE byteReason)
 }
 
 //----------------------------------------------------
+
+BOOL CPlayerPool::Process()
+{
+	return TRUE;
+}
+
+//----------------------------------------------------