Revert "Improve GQL query for fetching groups and projects"

Purpose of revert

We're seeing a recent high spike in 503 errors relating to the getTokenAccessGroupsAndProjects GraphQL operation. These are related to ActiveRecord::QueryCanceled errors.

See gitlab-com/gl-infra/production#18446 (closed).

We're reverting this MR to bring back functionality to this query.

Checklist

• Create an issue to reinstate the merge request and assign it to the author of the reverted merge request. (#480818 (closed))
• [-] If the revert is to resolve a broken 'master' incident, please read through the Responsibilities of the Broken master resolution DRI.
• [-] If the revert involves a database migration, please read through Deleting existing migrations.
• [-] Add the appropriate labels before the MR is created. We can skip CI/CD jobs only if the labels are added before the CI/CD pipeline is created.

Milestone info

• I am reverting something in the current milestone. No changelog is needed, and I've added a ~"regression:*" label.
• [-] I am reverting something in a different milestone. A changelog is needed, and I've removed the ~"regression:*" label.

Related issues and merge requests