[FIX] website_crm_partner_assign: onchange_assign_id new API conversion oversight
[FIX] website_crm_partner_assign: onchange_assign_id new API conversion oversight

You are not supposed to write anything in an onchange,
the result of the onchange must be assigned in the given fields
of `self`

This is an oversight during the migration to the new api of the module
in the below revision:
053982f48d4c824a68ee1e56e897d576530777c7

opw-694053

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