[FIX] website_portal_sale: image on a portal SO should always be displayed
[FIX] website_portal_sale: image on a portal SO should always be displayed

before this commit, when a portal SO was done with a product that hasn't been "website_published", a placeholder was displayed instead of the image
After this commit, the correct product image is displayed in base64 (always image_small though)

OPW 760880

Closes #18709

ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,ygol/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,ygol/odoo,ygol/odoo