The error message raised when linking a wrong SOline and a task used
unclear/incomplete information.
This commit improves the displayed message, replacing:
* the SO id by the SO reference, since record ids are not really useful to
end users.
* the product name by its display name, to include variants details.
closesodoo/odoo#68041
X-original-commit: 8db6e654a50d38001c42247b33392aad90cab821
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>