Prevent the webui from polling the list of calculations if authentication is enabled and the user is not logged in

[ptormene]

The changes in https://github.com/gem/oq-engine/pull/10248 make it possible to suppress log warnings like: WARNING Forbidden: /v1/calc/list We might revert those changes and fix the issue javascript-side, stopping the polling and giving some feedback to the user, in case the list of calculations can not be retrieved.