Light template is used is several notification processes as an alternate
layout to the classic one. It currently lacks any link to the document that
generated the notifications.
We add this behavior in this commit. Behavior is the same as the classic
notification email, aka a link to mail/view that chooses what to do based
on access rights and user status (internal, portal, ...).
Task-2621326 (Mail: add 'view' button in 'light notification template')
Part-of: odoo/odoo#76418
Thibault Delavallée
4059bbabac