QSqlResult::boundValues is a const member function, but returned a non-
const reference to a QList<QVariant>. This is a bad and potentially
dangerous API, as callers can modify the list stored in QSqlResult.
Move that API into the removed_api translation unit, remove it from
Qt 6.6 on and replace it with two suitable overloads where the const
version returns a QVariantList by value, and the non-const overload
returns a mutable reference.
Driver implementations that used to call the const overload to get a
mutable reference are now calling the non-const overload instead
(those calls are all made in the non-const exec() or equivalent driver
implementations).
As a drive-by, replace "vector" with "list" in the documentation.
Pick-to: 6.6
Change-Id: I6e4fd8f5749b939cdb609bf5876735e9b30b2b5a
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
3f72b0d5fc