Sqlite: Add readTo method

There are cases when you want to read to an already existing container.
This will prepare for the RETURNING extension in the next Sqlite version
where you can write and read. That will simplify quite some code.

Change-Id: I740ffbedecf72bb5518392f3707a0a6b2221db56
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/libs/sqlite/sqlitereadstatement.h

@@ -35,6 +35,7 @@ public:
     explicit ReadStatement(Utils::SmallStringView sqlStatement, Database &database);
 
     using StatementImplementation::readCallback;
+    using StatementImplementation::readTo;
     using StatementImplementation::toValue;
     using StatementImplementation::value;
     using StatementImplementation::values;