The _compute_related function can only update one translation but not all. We
decide not to update all translations to avoid increasing the time complexity.
As a result, the value for related translated fields should always be generated
in the runtime, and storing it is illegal.
A related translated stored field may work as expected in a single language
environment. But in mult languages environment, if you have a name field
name = fields.Char(related="parent_id.name", store=True)
changing parent_id in French, will only change the French translation of the
name field
This PR tries to remove these fields. And a warning is added to prevent
developers creating a related translated stored field in the future.
closesodoo/odoo#102553
Related: odoo/upgrade#4004
Signed-off-by: Wang Chong (cwg) <cwg@odoo.com>