Common: Make HookableEvent use non-static data.

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

Source/Core/VideoCommon/FramebufferManager.cpp

@@ -84,8 +84,8 @@ bool FramebufferManager::Initialize()
     return false;
   }
 
-  m_end_of_frame_event =
-      AfterFrameEvent::Register([this](Core::System&) { EndOfFrame(); }, "FramebufferManager");
+  m_end_of_frame_event = GetVideoEvents().after_frame_event.Register(
+      [this](Core::System&) { EndOfFrame(); }, "FramebufferManager");
 
   return true;
 }