[FIX] product: crash on product search
[FIX] product: crash on product search

- Go to Sales > Product Variants
- In the search field, type a letter (e.g. 'p'), then select a
  corresponding pricelist ('Public Pricelist' in demo data)

=> Crash

This is because `name_search` returns a list of tuple, not a browse
record.

Fixes #15443

hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,ygol/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,hip-odoo/odoo,dfang/odoo,ygol/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,dfang/odoo,ygol/odoo