[IMP] project: rework documents management

This commit gives a name to the Analytics section in the settings
to allow us to change its name easily with an xpath.

It also extracts the attachments domain in tasks so that it can be
overriden in documents_project to exclude attachements linked
to a document.

Related: https://github.com/odoo/enterprise/pull/26696
Related: https://github.com/odoo/upgrade/pull/3557

Task-2802803

Part-of: odoo/odoo#92044

addons/project/models/project.py

@@ -1499,9 +1499,13 @@ class Task(models.Model):
         if not self._check_recursion():
             raise ValidationError(_('Error! You cannot create a recursive hierarchy of tasks.'))
 
+    def _get_attachments_search_domain(self):
+        self.ensure_one()
+        return [('res_id', '=', self.id), ('res_model', '=', 'project.task')]
+
     def _compute_attachment_ids(self):
         for task in self:
-            attachment_ids = self.env['ir.attachment'].search([('res_id', '=', task.id), ('res_model', '=', 'project.task')]).ids
+            attachment_ids = self.env['ir.attachment'].search(task._get_attachments_search_domain()).ids
             message_attachment_ids = task.mapped('message_ids.attachment_ids').ids  # from mail_thread
             task.attachment_ids = [(6, 0, list(set(attachment_ids) - set(message_attachment_ids)))]
 

addons/project/views/res_config_settings_views.xml

@@ -96,7 +96,7 @@
                                 </div>
                             </div>
                         </div>
-                        <h2>Analytics</h2>
+                        <h2 name="section_analytics">Analytics</h2>
                         <div class="row mt16 o_settings_container" name="analytic">
                             <div class="col-12 col-lg-6 o_setting_box">
                                 <div class="o_setting_left_pane">