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/host_room.h

@@ -9,14 +9,16 @@
 #include <QSortFilterProxyModel>
 #include <QStandardItemModel>
 #include <QVariant>
-#include "citra_qt/multiplayer/chat_room.h"
 #include "citra_qt/multiplayer/validation.h"
-#include "network/network.h"
 
 namespace Ui {
 class HostRoom;
 }
 
+namespace Core {
+class System;
+}
+
 namespace Network {
 class AnnounceMultiplayerSession;
 }
@@ -34,7 +36,7 @@ class HostRoomWindow : public QDialog {
     Q_OBJECT
 
 public:
-    explicit HostRoomWindow(QWidget* parent, QStandardItemModel* list,
+    explicit HostRoomWindow(Core::System& system, QWidget* parent, QStandardItemModel* list,
                             std::shared_ptr<Network::AnnounceMultiplayerSession> session);
     ~HostRoomWindow();
 
@@ -50,6 +52,7 @@ private:
     std::unique_ptr<Network::VerifyUser::Backend> CreateVerifyBackend(bool use_validation) const;
 
     std::unique_ptr<Ui::HostRoom> ui;
+    Core::System& system;
     std::weak_ptr<Network::AnnounceMultiplayerSession> announce_multiplayer_session;
     QStandardItemModel* game_list;
     ComboBoxProxyModel* proxy;