Replace hardcoded list of permissions by dynamically querying GraphQL

Currently, the list of permissions associated to the Guest level is hardcoded in the frontend UI. A new GraphQL endpoint has been added to list all the permissions (sometimes referred as abilities) for a certain access level: Add new endpoint to list permissions based on a... (#422711 - closed)

The frontend UI has to be modified to remove the hardcoded permissions and to take advantage of the new GraphQL endpoint.