Update to latest HubSpot/hubspot-php

Hi

This library supports only legacy API
Please consider switching to the latest API.

https://github.com/HubSpot/hubspot-php is only for legacy now, i think we should focus on https://www.drupal.org/project/hubspot_api/issues/3334746 ✨ Switch to PHP HubSpot API v3 SDK Client Needs review and close this issue.