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/Config/CheatWarningWidget.cpp

@@ -3,6 +3,8 @@
 
 #include "DolphinQt/Config/CheatWarningWidget.h"
 
+#include <utility>
+
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QPixmap>
@@ -16,9 +18,8 @@
 #include "DolphinQt/QtUtils/QtUtils.h"
 #include "DolphinQt/Settings.h"
 
-CheatWarningWidget::CheatWarningWidget(const std::string& game_id, bool restart_required,
-                                       QWidget* parent)
-    : QWidget(parent), m_game_id(game_id), m_restart_required(restart_required)
+CheatWarningWidget::CheatWarningWidget(std::string game_id, bool restart_required, QWidget* parent)
+    : QWidget(parent), m_game_id(std::move(game_id)), m_restart_required(restart_required)
 {
   CreateWidgets();
   ConnectWidgets();

Source/Core/DolphinQt/Config/CheatWarningWidget.h

@@ -14,7 +14,7 @@ class CheatWarningWidget : public QWidget
 {
   Q_OBJECT
 public:
-  explicit CheatWarningWidget(const std::string& game_id, bool restart_required, QWidget* parent);
+  explicit CheatWarningWidget(std::string game_id, bool restart_required, QWidget* parent);
 
 signals:
   void OpenCheatEnableSettings();

Source/Core/DolphinQt/Config/ConfigControls/ConfigChoice.cpp

@@ -91,7 +91,7 @@ void ConfigStringChoice::OnConfigChanged()
   Load();
 }
 
-ConfigComplexChoice::ConfigComplexChoice(const InfoVariant setting1, const InfoVariant setting2,
+ConfigComplexChoice::ConfigComplexChoice(const InfoVariant& setting1, const InfoVariant& setting2,
                                          Config::Layer* layer)
     : m_layer(layer), m_setting1(setting1), m_setting2(setting2)
 {

Source/Core/DolphinQt/Config/ConfigControls/ConfigChoice.h

@@ -109,7 +109,7 @@ class ConfigComplexChoice final : public ToolTipComboBox
   using OptionVariant = std::variant<Config::DefaultState, u32, int, bool>;
 
 public:
-  ConfigComplexChoice(const InfoVariant setting1, const InfoVariant setting2,
+  ConfigComplexChoice(const InfoVariant& setting1, const InfoVariant& setting2,
                       Config::Layer* layer = nullptr);
 
   void Add(const QString& name, const OptionVariant option1, const OptionVariant option2);

Source/Core/DolphinQt/Config/VerifyWidget.cpp

@@ -101,7 +101,8 @@ void VerifyWidget::CreateWidgets()
   m_verify_button = new QPushButton(tr("Verify Integrity"), this);
 }
 
-std::pair<QCheckBox*, QLineEdit*> VerifyWidget::AddHashLine(QFormLayout* layout, QString text)
+std::pair<QCheckBox*, QLineEdit*> VerifyWidget::AddHashLine(QFormLayout* layout,
+                                                            const QString& text)
 {
   QLineEdit* line_edit = new QLineEdit(this);
   line_edit->setReadOnly(true);
@@ -225,7 +226,7 @@ void VerifyWidget::Verify()
     m_redump_line_edit->setText(QString::fromStdString(result->redump.message));
 }
 
-void VerifyWidget::SetProblemCellText(int row, int column, QString text)
+void VerifyWidget::SetProblemCellText(int row, int column, const QString& text)
 {
   QLabel* label = new QLabel(text);
   label->setTextInteractionFlags(Qt::TextSelectableByMouse);

Source/Core/DolphinQt/Config/VerifyWidget.h

@@ -32,13 +32,13 @@ public:
 private:
   void OnEmulationStateChanged(Core::State state);
   void CreateWidgets();
-  std::pair<QCheckBox*, QLineEdit*> AddHashLine(QFormLayout* layout, QString text);
+  std::pair<QCheckBox*, QLineEdit*> AddHashLine(QFormLayout* layout, const QString& text);
   void ConnectWidgets();
 
   bool CanVerifyRedump() const;
   void UpdateRedumpEnabled();
   void Verify();
-  void SetProblemCellText(int row, int column, QString text);
+  void SetProblemCellText(int row, int column, const QString& text);
 
   std::shared_ptr<DiscIO::Volume> m_volume;
   QTableWidget* m_problems;