[FIX] project: show 'View Task' in subtask when same project than parent

Before this commit, when the a subtask is in the same project than the
parent one and the internal user has manually set the project to see
this task in the main kanban view of tasks of the project. In project
sharing view, the collaborator cannot see the 'View Task' button in the
sub list view of subtasks shown in the form view of the parent one.

This commit fixes it to shown the button when the subtask is in the same
project than the parent one.

Steps to reproduce:
==================
1) Create a Project A
2) Create a Task T in the Project A
3) Add a subtask in T and set the project A in the subtask
4) Share in edit mode the project A to a portal user
5) Log out and log in as the portal user
6) Go to the Project A to see the kanban view of tasks in project
sharing feature.
7) Go to the task T and see the subtasks list view.

Expected Behaviour:
==================
The 'View Task' should be shown for this subtask because the subtask is
in the same project than the parent one.

Actual Behaviour:
================
This button is not shown.

Bug found during the testing of the task-2648955

closes odoo/odoo#82383

X-original-commit: ddafb7fa5aff30e2cb16dcdcb5cdbd44397de126
Signed-off-by: Laurent Stukkens (ltu) <ltu@odoo.com>

addons/project/views/project_sharing_views.xml

@@ -215,7 +215,7 @@
                                     <field name="stage_id" optional="show"/>
                                     <button name="action_open_task" type="object" title="View Task" string="View Task" class="btn btn-link pull-right"
                                             context="{'form_view_ref': 'project.project_sharing_project_task_view_form'}"
-                                            attrs="{'invisible': [('display_project_id', '!=', False), ('display_project_id', '!=', 'parent.display_project_id')]}"/>
+                                            attrs="{'invisible': &quot;[('display_project_id', '!=', False), ('display_project_id', '!=', active_id)]&quot;}"/>
                                 </tree>
                             </field>
                         </page>