yuzu qt: config: Only save renderer_debug as a global setting

This is a bug fix. Enabling graphics debug mode, then saving a custom
configuration causes graphics debugging to be saved and read from the
custom configuration.

Isolate it the same way we isolate the CPU settings.

src/yuzu/configuration/config.cpp

@@ -820,7 +820,6 @@ void Config::ReadRendererValues() {
     qt_config->beginGroup(QStringLiteral("Renderer"));
 
     ReadGlobalSetting(Settings::values.renderer_backend);
-    ReadBasicSetting(Settings::values.renderer_debug);
     ReadGlobalSetting(Settings::values.vulkan_device);
     ReadGlobalSetting(Settings::values.fullscreen_mode);
     ReadGlobalSetting(Settings::values.aspect_ratio);
@@ -842,6 +841,10 @@ void Config::ReadRendererValues() {
     ReadGlobalSetting(Settings::values.bg_green);
     ReadGlobalSetting(Settings::values.bg_blue);
 
+    if (global) {
+        ReadBasicSetting(Settings::values.renderer_debug);
+    }
+
     qt_config->endGroup();
 }
 
@@ -1342,7 +1345,6 @@ void Config::SaveRendererValues() {
                  static_cast<u32>(Settings::values.renderer_backend.GetValue(global)),
                  static_cast<u32>(Settings::values.renderer_backend.GetDefault()),
                  Settings::values.renderer_backend.UsingGlobal());
-    WriteBasicSetting(Settings::values.renderer_debug);
     WriteGlobalSetting(Settings::values.vulkan_device);
     WriteGlobalSetting(Settings::values.fullscreen_mode);
     WriteGlobalSetting(Settings::values.aspect_ratio);
@@ -1367,6 +1369,10 @@ void Config::SaveRendererValues() {
     WriteGlobalSetting(Settings::values.bg_green);
     WriteGlobalSetting(Settings::values.bg_blue);
 
+    if (global) {
+        WriteBasicSetting(Settings::values.renderer_debug);
+    }
+
     qt_config->endGroup();
 }