When editing a website form, a `search_read` request is fired on
`ir.model` model to get the list of possible form actions (create
ticket, create opportunity, etc.).
But since commit [1] in Odoo 15, non-admin users don't have read access
anymore on this model, leading to a traceback when clicking on a form in
edit mode.

Steps to reproduce (as designer):
- Install only website and login as admin
- Make "portal" user an internal user and give him "Editor and Designer"
  rights
- Login as "portal" user
- Enter edit mode on any page and drag & drop the form snippet, or
  simply go to /contactus page which already has one
- Click on the form -> Traceback

Steps to reproduce (as publisher/restricted editor):
- Install website_hr_recruitment
- Make "portal" user an internal user and give him the following rights:
  - Website: Restricted Editor
  - Recruitment: Administrator
- Login as "portal" user
- Go to a job page like /jobs/detail/experienced-developer-4
- Enter edit mode and drag & drop the form snippet
- It will crash

[1]: https://github.com/odoo/odoo/commit/5dc4cff60a557e14b08440c227423291c407899b

[opw-3098097](https://www.odoo.com/web#id=3098097&view_type=form&model=project.task&menu_id&cids=1)
opw-3101884

Forward-Port-Of: odoo/odoo#109115
Forward-Port-Of: odoo/odoo#108680