SQL/Doc: add note about QAnyStringView

Add a note to all functions now taking a QAnyStringView that their
signature changed from QString to QAnyStringView

Change-Id: Ib9743b5b2c437724c6308e74ef3c5820136a34f5
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit a736a3c670929e3b73e11b33cc1705957c42961b)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/sql/kernel/qsqlquery.cpp

@@ -335,6 +335,9 @@ bool QSqlQuery::isNull(int field) const
     returns isNull(int index) for the corresponding field index.
 
     This overload is less efficient than \l{QSqlQuery::}{isNull()}
+
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
 */
 bool QSqlQuery::isNull(QAnyStringView name) const
 {
@@ -446,6 +449,9 @@ QVariant QSqlQuery::value(int index) const
     If field \a name does not exist an invalid variant is returned.
 
     This overload is less efficient than \l{QSqlQuery::}{value()}
+
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
 */
 QVariant QSqlQuery::value(QAnyStringView name) const
 {

src/sql/kernel/qsqlrecord.cpp

@@ -193,6 +193,9 @@ QVariant QSqlRecord::value(int index) const
     Returns the value of the field called \a name in the record. If
     field \a name does not exist an invalid variant is returned.
 
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
+
     \sa indexOf(), isNull()
 */
 QVariant QSqlRecord::value(QAnyStringView name) const
@@ -218,6 +221,9 @@ QString QSqlRecord::fieldName(int index) const
     case-sensitive. If more than one field matches, the first one is
     returned.
 
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
+
     \sa fieldName()
  */
 int QSqlRecord::indexOf(QAnyStringView name) const
@@ -244,6 +250,9 @@ QSqlField QSqlRecord::field(int index) const
     Returns the field called \a name. If the field called
     \a name is not found, function returns
     a \l{default-constructed value}.
+
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
  */
 QSqlField QSqlRecord::field(QAnyStringView name) const
 {
@@ -333,6 +342,9 @@ bool QSqlRecord::isEmpty() const
 /*!
     Returns \c true if there is a field in the record called \a name;
     otherwise returns \c false.
+
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
 */
 bool QSqlRecord::contains(QAnyStringView name) const
 {
@@ -359,6 +371,9 @@ void QSqlRecord::clearValues()
     fields that have \a generated set to true are included in the SQL
     that is generated by QSqlQueryModel for example.
 
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
+
     \sa isGenerated()
 */
 void QSqlRecord::setGenerated(QAnyStringView name, bool generated)
@@ -397,6 +412,9 @@ bool QSqlRecord::isNull(int index) const
     Returns \c true if the field called \a name is null or if there is no
     field called \a name; otherwise returns \c false.
 
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
+
     \sa setNull()
 */
 bool QSqlRecord::isNull(QAnyStringView name) const
@@ -423,6 +441,9 @@ void QSqlRecord::setNull(int index)
 
     Sets the value of the field called \a name to null. If the field
     does not exist, nothing happens.
+
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
 */
 void QSqlRecord::setNull(QAnyStringView name)
 {
@@ -435,6 +456,9 @@ void QSqlRecord::setNull(QAnyStringView name)
     Returns \c true if the record has a field called \a name and this
     field is to be generated (the default); otherwise returns \c false.
 
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
+
     \sa setGenerated()
 */
 bool QSqlRecord::isGenerated(QAnyStringView name) const
@@ -485,6 +509,9 @@ void QSqlRecord::setValue(int index, const QVariant &val)
     Sets the value of the field called \a name to \a val. If the field
     does not exist, nothing happens.
 
+    \note In Qt versions prior to 6.8, this function took QString, not
+    QAnyStringView.
+
     \sa setNull()
 */
 void QSqlRecord::setValue(QAnyStringView name, const QVariant &val)