Improve usage of std::move and const references parameters

Accomplished using `run-clang-tidy` with `performance-move-const-arg,performance-unnecessary-value-param,modernize-pass-by-value`.

Changed arguments to const references, removed them where inappropriate (e.g. sink parameters). Same with std::move.

Manually reviewed each change to make sure that it makes sense, and do something more appropriate if possible.

Source/Core/DolphinQt/Achievements/AchievementsWindow.cpp

@@ -34,7 +34,7 @@ AchievementsWindow::AchievementsWindow(QWidget* parent) : QDialog(parent)
   m_event_hook = AchievementManager::GetInstance().update_event.Register(
       [this](AchievementManager::UpdatedItems updated_items) {
         QueueOnObject(this, [this, updated_items = std::move(updated_items)] {
-          AchievementsWindow::UpdateData(std::move(updated_items));
+          AchievementsWindow::UpdateData(updated_items);
         });
       });
   UpdateData(AchievementManager::UpdatedItems{.all = true});
@@ -80,7 +80,7 @@ void AchievementsWindow::ConnectWidgets()
   connect(m_button_box, &QDialogButtonBox::rejected, this, &QDialog::reject);
 }
 
-void AchievementsWindow::UpdateData(AchievementManager::UpdatedItems updated_items)
+void AchievementsWindow::UpdateData(const AchievementManager::UpdatedItems& updated_items)
 {
   m_settings_widget->UpdateData(updated_items.failed_login_code);
   if (updated_items.all)