The note "Quotation viewed by customer" posted when a public/portal user
access an order came with the order's partner name instead of the actual
user's partner name

This made confused for internal users to see something in internal note
like **Colleen Diaz** with a message **Quotation viewed by customer
Nicole Ford**

This commit makes sure to use the right partner name except the
quotation is viewed anonymously (with access token)

closes odoo/odoo#121515

X-original-commit: 3489fd16
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>