Qt: Move emulation speed settings to console settings

src/duckstation-qt/consolesettingswidget.h

@@ -20,6 +20,9 @@ private Q_SLOTS:
   void onCPUClockSpeedValueChanged(int value);
   void updateCPUClockSpeedLabel();
   void onCDROMReadSpeedupValueChanged(int value);
+  void onEmulationSpeedIndexChanged(int index);
+  void onFastForwardSpeedIndexChanged(int index);
+  void onTurboSpeedIndexChanged(int index);
 
 private:
   void calculateCPUClockValue();