Miscallenious fixes to gl backend and qt frontend (#6834)

* renderer_gl: Make rasterizer normal class member

* It doesn't need to be heap allocated anymore

* gl_rasterizer: Remove default_texture

* It's unused

* gl_rasterizer: General cleanup

* gl_rasterizer: Lower case lambdas

* Match style with review comments from vulkan backend

* rasterizer_cache: Prevent memory leak

* Since the switch from shared_ptr these surfaces were no longer being destroyed properly. Use our garbage collector for that purpose to destroy it safely for both backends

* rasterizer_cache: Make temp copy of old surface

* The custom surface would override the memory region of the old region resulting in garbage data, this ensures the custom surface is constructed correctly

* citra_qt: Manually create dialog tabs

* Allows for custom constructors which is very useful. While at it, global state is now eliminated from configuration

* citra_qt: Eliminate global system usage

* core: Remove global system usage in memory and HIO

* citra_qt: Use qOverload

* tests: Run clang format

* gl_texture_runtime: Fix surface scaling

src/citra_qt/multiplayer/state.h

@@ -15,12 +15,16 @@ class ClientRoomWindow;
 class DirectConnectWindow;
 class ClickableLabel;
 
+namespace Core {
+class System;
+}
+
 class MultiplayerState : public QWidget {
     Q_OBJECT;
 
 public:
-    explicit MultiplayerState(QWidget* parent, QStandardItemModel* game_list, QAction* leave_room,
-                              QAction* show_room);
+    explicit MultiplayerState(Core::System& system, QWidget* parent, QStandardItemModel* game_list,
+                              QAction* leave_room, QAction* show_room);
     ~MultiplayerState();
 
     /**
@@ -71,6 +75,7 @@ signals:
     void AnnounceFailed(const Common::WebResult&);
 
 private:
+    Core::System& system;
     Lobby* lobby = nullptr;
     HostRoomWindow* host_room = nullptr;
     ClientRoomWindow* client_room = nullptr;