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/configuration/configure_hotkeys.cpp

@@ -9,7 +9,6 @@
 #include "citra_qt/configuration/configure_hotkeys.h"
 #include "citra_qt/hotkeys.h"
 #include "citra_qt/util/sequence_dialog/sequence_dialog.h"
-#include "common/settings.h"
 #include "ui_configure_hotkeys.h"
 
 constexpr int name_column = 0;
@@ -189,9 +188,9 @@ void ConfigureHotkeys::PopupContextMenu(const QPoint& menu_location) {
     QAction* clear = context_menu.addAction(tr("Clear"));
 
     const auto hotkey_index = index.sibling(index.row(), hotkey_column);
-    connect(restore_default, &QAction::triggered,
+    connect(restore_default, &QAction::triggered, this,
             [this, hotkey_index] { RestoreHotkey(hotkey_index); });
-    connect(clear, &QAction::triggered,
+    connect(clear, &QAction::triggered, this,
             [this, hotkey_index] { model->setData(hotkey_index, QString{}); });
 
     context_menu.exec(ui->hotkey_list->viewport()->mapToGlobal(menu_location));