[FIX] survey: fix group by partner filter
[FIX] survey: fix group by partner filter

While clicking on the answer in appraisal, it gives traceback because of this
context filter. This commit is related to task ID 1866476 and closes PR #25749.

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo