Add an option to disable handling of positional binding so jsonb
operators are not screwed up
[ChangeLog][QtSql][QSqlQuery] Add setEnablePositionalBinding() to be
able to disable positional binding.
Fixes: QTBUG-96636
Change-Id: I428a9d3b10274b97292ab86a74d9b3971d6f10e9
Reviewed-by: Andy Shaw <andy.shaw@qt.io>