Before this commit when the portal user changes the stage of a task
to a stage with sms template, he got a traceback saying he has no access
to the `sms.template` model.
This commit fixes by checking if the user is a portal one to send the
sms in sudo when the write on the task is correctly done.
Steps to reproduce:
==================
1) install `project_sms` module,
2) create a project,
3) in the kanban of tasks for this project create 2 stages,
4) edit the last one to set a sms template,
5) share the project in edit mode to a portal user,
6) create a task with the quick create,
7) log in as portal user and go the project shared
8) move the task into the last stage.
Actual Behavior:
---------------
A traceback is occurred saying the portal user has no access to
`sms.template` model.
Expected behavior:
-----------------
The task should be in the last stage and the sms should be sent.
closesodoo/odoo#99363
X-original-commit: 9aa5e65273885001106a5fcc64677a284b77f61d
Signed-off-by: Laurent Stukkens (ltu) <ltu@odoo.com>