[FIX] *: cache consistency

In module mail, invalidating 'message_ids' on a mail thread also
invalidates its inverse field 'res_id' on messages.  If you haven't
flushed it before, your cache will be inconsistent, as shown by the test
/mail:TestMailgateway.test_message_process_bounce_records_channel.

In module purchase_stock, add depends on report.stock.quantity.  This
ensures that when the model is queried after changes in other models,
the data on which the SQL view depends is flushed to the database before
querying that model's table.

closes odoo/odoo#66938

Related: odoo/enterprise#16722
Signed-off-by: Raphael Collet <rco@odoo.com>
Co-authored-by: Vincent Schippefilt <vsc@odoo.com>