Steps to reproduce:
-------------------
- create a new employee;
- link it to an existing user;
- save (trigger a validation error);
- remove the related user;
- save;
- change the email address of this new employee;
Issue:
------
The email address of the employee linked to the user
that we tried to link is updated.
Cause:
------
We don't sync the employee with the user if the user is `False`,
i.e. we don't update the employee's `work_contact_id` if the `user_id` is `False`.
Solution:
---------
Update the `work_contact_id` in any case.
opw-3475002
closesodoo/odoo#133191
X-original-commit: c2f2dc3e49ee7cd96d4da05f2236441e65090753
Signed-off-by: Sofie Gvaladze (sgv) <sgv@odoo.com>
Signed-off-by: Thomas Lefebvre (thle) <thle@odoo.com>