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/video_core/renderer_software/renderer_software.cpp

@@ -13,7 +13,7 @@ namespace SwRenderer {
 
 RendererSoftware::RendererSoftware(Core::System& system, Frontend::EmuWindow& window)
     : VideoCore::RendererBase{system, window, nullptr}, memory{system.Memory()},
-      rasterizer{std::make_unique<RasterizerSoftware>(system.Memory())} {}
+      rasterizer{system.Memory()} {}
 
 RendererSoftware::~RendererSoftware() = default;
 

src/video_core/renderer_software/renderer_software.h

@@ -24,8 +24,8 @@ public:
     explicit RendererSoftware(Core::System& system, Frontend::EmuWindow& window);
     ~RendererSoftware() override;
 
-    [[nodiscard]] VideoCore::RasterizerInterface* Rasterizer() const override {
-        return rasterizer.get();
+    [[nodiscard]] VideoCore::RasterizerInterface* Rasterizer() override {
+        return &rasterizer;
     }
 
     [[nodiscard]] const ScreenInfo& Screen(VideoCore::ScreenId id) const noexcept {
@@ -42,7 +42,7 @@ private:
 
 private:
     Memory::MemorySystem& memory;
-    std::unique_ptr<RasterizerSoftware> rasterizer;
+    RasterizerSoftware rasterizer;
     std::array<ScreenInfo, 3> screen_infos{};
 };