SaaS Max seats used job failing

Summary

The SaaS Max seats used job has been failing for the last 18 days.

• https://sentry.gitlab.net/gitlab/gitlabcom/issues/2590980/
• https://sentry.gitlab.net/gitlab/gitlabcom/issues/2579760/

This is causing customer subscription information on GitLab.com group billing page to be inaccurate.