Common: Make HookableEvent use non-static data.

Co-authored-by: Dentomologist <[email protected]>

Source/Core/DolphinQt/Debugger/MemoryWidget.cpp

@@ -429,7 +429,8 @@ void MemoryWidget::hideEvent(QHideEvent* event)
 
 void MemoryWidget::RegisterAfterFrameEventCallback()
 {
-  m_vi_end_field_event = VIEndFieldEvent::Register([this] { AutoUpdateTable(); }, "MemoryWidget");
+  m_vi_end_field_event = m_system.GetVideoEvents().vi_end_field_event.Register(
+      [this] { AutoUpdateTable(); }, "MemoryWidget");
 }
 
 void MemoryWidget::RemoveAfterFrameEventCallback()