Sqlite: Add callback method

Sometimes it is better to have a callback instead of returning a container.
The call has to manage the state if an exception is called but otherwise
it will reduce the memory footprint. There will be to a RETURNING
to Sqlite which will read back values as you write.

Change-Id: I7eb49850e2c76f883a03277b31c5e713e9774c92
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/libs/sqlite/sqlitereadstatement.h

@@ -34,9 +34,10 @@ class SQLITE_EXPORT ReadStatement final : protected StatementImplementation<Base
 public:
     explicit ReadStatement(Utils::SmallStringView sqlStatement, Database &database);
 
+    using StatementImplementation::readCallback;
+    using StatementImplementation::toValue;
     using StatementImplementation::value;
     using StatementImplementation::values;
-    using StatementImplementation::toValue;
 
 protected:
     void checkIsReadOnlyStatement();