[FIX] website: display archived website visitors

When computing time statistics, we need to look for
archived website visitors also to avoid a KeyError
if we use the default 'Archived' filter.

closes odoo/odoo#39918

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/website/models/website_visitor.py

@@ -117,7 +117,7 @@ class WebsiteVisitor(models.Model):
 
     @api.depends('last_connection_datetime')
     def _compute_time_statistics(self):
-        results = self.env['website.visitor'].search_read([('id', 'in', self.ids)], ['id', 'last_connection_datetime'])
+        results = self.env['website.visitor'].with_context(active_test=False).search_read([('id', 'in', self.ids)], ['id', 'last_connection_datetime'])
         mapped_data = {result['id']: result['last_connection_datetime'] for result in results}
 
         for visitor in self: