Rest of QtBase: compile-optimize inline swap functions

Instead of using the overly-generic qSwap() monster, use

- qt_ptr_swap() for swapping raw pointers
- member-swap for swapping smart pointers and owning containers

In QtCore, this has proven to give a nice reduction in compile time
for Qt users, cf. b1b0c2970e.

Pick-to: 6.3 6.2
Task-number: QTBUG-97601
Change-Id: I53e031a021031d53a74a712cd0f5e6bb8bf800bd
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/opengl/qopengldebug.h

@@ -112,7 +112,7 @@ public:
     QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QOpenGLDebugMessage)
     ~QOpenGLDebugMessage();
 
-    void swap(QOpenGLDebugMessage &other) noexcept { qSwap(d, other.d); }
+    void swap(QOpenGLDebugMessage &other) noexcept { d.swap(other.d); }
 
     Source source() const;
     Type type() const;

src/sql/kernel/qsqlerror.h

@@ -70,7 +70,7 @@ public:
     bool operator!=(const QSqlError& other) const;
     ~QSqlError();
 
-    void swap(QSqlError &other) noexcept { qSwap(d, other.d); }
+    void swap(QSqlError &other) noexcept { qt_ptr_swap(d, other.d); }
 
     QString driverText() const;
     QString databaseText() const;

src/sql/kernel/qsqlquery.h

@@ -80,9 +80,7 @@ public:
     ~QSqlQuery();
 
     void swap(QSqlQuery &other) noexcept
-    {
-        qSwap(d, other.d);
-    }
+    { qt_ptr_swap(d, other.d); }
 
     bool isValid() const;
     bool isActive() const;

src/sql/models/qsqlrelationaltablemodel.h

@@ -60,9 +60,9 @@ public:
 
     void swap(QSqlRelation &other) noexcept
     {
-        qSwap(tName, other.tName);
-        qSwap(iColumn, other.iColumn);
-        qSwap(dColumn, other.dColumn);
+        tName.swap(other.tName);
+        iColumn.swap(other.iColumn);
+        dColumn.swap(other.dColumn);
     }
 
     inline QString tableName() const