We take advantage of SQL objects to discard the use of domain operators
'inselect and 'not inselect'. Indeed, as we now support SQL objects at
the right-hand side of a condition, one can replace conditions like
(lhs, 'inselect', (query, params)) by (lhs, 'in', SQL(query, *params)).
This commit also adds tests that ensure the correct behavior of the
adaptation of the implementation.
Part-of: odoo/odoo#138019
Raphael Collet
026993775f