[FIX] models: m2o display name as sudo in read_group
[FIX] models: m2o display name as sudo in read_group

In 10.0, the resolution of the m2o field in a read group was
done with a `read` (which sudo the name_get). So, the access
rights were bypassed to get the display_name of the related
records.
In 11.0, a call to `name_get` but not as `sudo` causing access
error in some case. For instance;
- a user has read access on project
- he log some timesheets
- its access to project is removed, but not the timesheet ones
- trying to access its own timesheet via the grid view (which does
a read_group)
- the user gets the access error for project.

The read_group should reproduce the behavior of the `read` method,
so the `name_get` for m2o field during a read_group is now sudoed
to restore previous behavior.

opw-1855942

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo