The goal of this revision is to get rid of the `groups_id` field of the model `ir.ui.view`.
- This feature wasn't really known or used by most developers,
and not straight-forward to understand.
Removing it allows one less complicated thing to learn for developers.
Besides, thanks to odoo/odoo#95729,
changing the behavior of the `groups=` attribute,
we can easily get rid of this `groups_id` feature
by simply adding `groups=` in the elements of the views
using the `groups_id` field, it will have the same effect:
adding the elements in the view only for the users part of the specified group.
- By getting rid of the groups_id many2many field on ir.ui.view,
it makes possible to cache the view architecture without
requiring to use the groups in the cache key.
Currently, if we want to cache the view architecture,
it would be required to use the intersection of the user
groups with the groups_id groups of the view,
making it costly to compute the cache key,
therefore altering the performance point to cache the view
architectures.
Part-of: odoo/odoo#98551