configuration: add option to select network interface

This commit renames the "Services" tab to "Network" and adds a combobox that allows the user to select the network interface that yuzu should use. This new setting is now used to get the local IP address in Network::GetHostIPv4Address. This prevents yuzu from selecting the wrong network interface and thus using the wrong IP address. The return type of Network::GetHostIPv4Adress has also been changed.

src/yuzu/configuration/config.h

@@ -88,7 +88,7 @@ private:
     void SaveCoreValues();
     void SaveDataStorageValues();
     void SaveDebuggingValues();
-    void SaveServiceValues();
+    void SaveNetworkValues();
     void SaveDisabledAddOnValues();
     void SaveMiscellaneousValues();
     void SavePathValues();