Before this revision, the pivot table was not autoresized when group bys
contains a many2one or a many2many field as it required an extra
request to get the name_get of the values.
With this revision, the values of the relational fields are extracted
from the pivot model in order to save an extra request.
Note: this fix is not ideal as it introduce a dependency between the
pivot model and the server data source. However, it is the best
solution in a stable version.
Task-id 2928601
closesodoo/odoo#108527
X-original-commit: d6a1aa63702132ffc59d2412c2a009912eba797a
Signed-off-by: Lucas Lefèvre (lul) <lul@odoo.com>