[FIX] project: access error when internal user is in project sharing form view

Before this commit, when the internal user is not follower of the
project and enter in the project sharing feature. If he wants to see the
form view of a task, he cannot and have a Session expired error.
This issue arrives because in the chatter we check is the user is a
follower of the project shared.

This commit fixes this issue by just using the _document_check_access
method to check if the user can access to the document. Indeed, we don't
need to check if user is a follower because the _document_check_access
does it with the `ir.rules`.

Related PR: #73341

Part of task-2633229

closes #76098

addons/project/controllers/project_sharing_chatter.py

@@ -4,7 +4,6 @@
 from werkzeug.exceptions import Forbidden
 
 from odoo.http import request, route
-from odoo.tools import consteq
 
 from odoo.addons.portal.controllers.mail import PortalChatter
 from .portal import ProjectCustomerPortal
@@ -24,10 +23,6 @@ class ProjectSharingChatter(PortalChatter):
         """
         project_sudo = ProjectCustomerPortal._document_check_access(self, 'project.project', project_id, token)
         can_access = project_sudo and res_model == 'project.task' and project_sudo.with_user(request.env.user)._check_project_sharing_access()
-        if token:
-            can_access &= consteq(project_sudo.access_token, token)
-        else:
-            can_access &= request.env.user.partner_id.commercial_partner_id in project_sudo.message_partner_ids
         task = None
         if can_access:
             task = request.env['project.task'].sudo().search([('id', '=', res_id), ('project_id', '=', project_sudo.id)])