Steps to reproduce:

- Go to Projects and find one having field "sale_line_id" set
  (example "AGR - S00048" with
  "S00048 - Senior Architect (Invoice on Timesheets)")
- Go to Sales -> Quotations and :
  1/ cancel
  2/ set in draft
  3/ edit Project to "AGR - SO00048"
  4/ confirm again (see attached)
- Alter Marc Demo access right to have:
  Sales -> Administrator
  Project -> User
- With Marc Demo, go to Sales -> Quotations and open S00048
- Try to cancel it

Issue:

  Access right error.

Cause:

  When canceling a SO, we remove the related SO line on the project
  however the current user have access to edit SO but not the project.

Solution:

  Use sudo().

opw-2959627

closes odoo/odoo#98956

Signed-off-by: Xavier <xbo@odoo.com>