16.0[IMP]document_page: menu_parent_id context domain of menu creation

[Tisho99]

On the document_page module, there is one use case when we can't correctly create a menu item for a page.

This case occurs when we want to create the document menu under a new "Documentation" menu. Example:

Sales
- Documentation
- Page 1
- Page 2
...

Steps to reproduce:

1. Create the "Documentation" parent menu, as it is a folder we dont fill the 'action' field.
2. Go to a knowledge document form, and select action -> create mene. You can see that the "Documentation" menu does not appear on the parent menu's list.

The reason of the problem is that, by default, we only can see the menus that have an action, or a child with actions.
To see all, odoo gives a context parameter that can be placed on the field: context="{'ir.ui.menu.full_list': True}".
However, with this context on the menu_parent_id of the document_page create menu wizard the document users are able to see menus they must not be able to see due to permission groups; and they can create aditional menus under the unauthorized ones.
To solve this, a new context parameter has been created: "ir.ui.menu.authorized_list", that allows to see all menus, except the unauthorized by permission groups

PD: A unit test is in progress

[Tisho99]

@ValentinVinagre

[ValentinVinagre]

@HaraldPanten @etobella 😄

[Tisho99]

@etobella

I will put this PR in draft for some time because i am developing a unit test

Thank you for your review!

[ValentinVinagre]

LGTM 👍🏻

[etobella]

/ocabot merge patch

[OCA-git-bot]

On my way to merge this fine PR!
Prepared branch 16.0-ocabot-merge-pr-448-by-etobella-bump-patch, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at 954d7b2. Thanks a lot for contributing to OCA. ❤️