DownloadManager: Always use Nintendo servers + additional streamlining

- Download manager now always uses Nintendo servers. Requires only a valid OTP and SEEPROM dump so you can use it in combination with a Pretendo setup even without a NNID
- Account drop down removed from download manager since it's not required
- Internally all our API requests now support overriding which service to use
- Drop support for act-url and ecs-url command line parameters. Usage of network_services.xml ("custom" option in the UI) is preferred

src/config/LaunchSettings.h

@@ -29,10 +29,6 @@ public:
 
 	static std::optional<uint32> GetPersistentId() { return s_persistent_id; }
 
-	static std::string GetActURLPrefix() { return serviceURL_ACT; }
-	static std::string GetServiceURL_ecs() { return serviceURL_ECS; }
-	static void ChangeNetworkServiceURL(int ID);
-
 private:
 	inline static std::optional<fs::path> s_load_game_file{};
     inline static std::optional<uint64> s_load_title_id{};
@@ -48,12 +44,6 @@ private:
 	
 	inline static std::optional<uint32> s_persistent_id{};
 
-	// service URLS
-	inline static std::string serviceURL_ACT;
-	inline static std::string serviceURL_ECS;
-	// todo - npts and other boss urls
-
-
 	static bool ExtractorTool(std::wstring_view wud_path, std::string_view output_path, std::wstring_view log_path);
 };