Manage restricted attributes for images and vnets on Sunstone

[dcarracedo]

Description
In one config we have some attributes set as restricted, so a regular user cannot create, update or delete these attributes. In #6154 the restricted attributes of a virtual machine are managed in Fireedge Sunstone to avoid that an user can create, update or delete.

On this feature, we need to do the same but with the attributes for images and virtual networks.

Use case
The non admin users will use this feature to avoid errors and manage images and virtual networks without any problem.

Interface Changes
On Fireedge Sunstone, int the forms to create/update images and virtual networks, the restricted attributes will be show as read only because the user can see it but not modify it.
Also, a non admin user cannot delete an image or a virtual network if one of them has restricted attributes.

Additional Context
Use the disable disableFields function to manage this fields.

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)