Purpose of this commit is to have access to slide.slide.partner model that
holds member progress on specific slide. It is used notably to build completion
on slide.channel.partner or to store vote data. It is interesting to have
access to it to have some detailed informations.
It is now reachable through the "attendees" smart button that replaces the
'views' button. Public / other views are moved in slide details as those
buttons do not add much to the slide usability.
Task-2607416
Part-of: odoo/odoo#74171
Thibault Delavallée
924ca810ef