Redirect GraphQL requests when project is transferred
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Label this issue](https://contributors.gitlab.com/manage-issue?action=label&projectId=278964&issueIid=577662) </details> <!--IssueSummary end--> When a project is transferred, GraphQL returns empty results when fetching by old namespace and iid. There was a similar feature request implemented for API https://gitlab.com/gitlab-org/gitlab/-/issues/30013 Feature flag https://gitlab.com/gitlab-org/gitlab/-/issues/421992 ### Proposal When the work item is fetched via GraphQL, Gitlab handles any redirects: * [Related GraphQL code](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/graphql/loaders/full_path_model_loader.rb?ref_type=heads#L17-17) * find_by_full_path(id, follow_redirects: true) in [API response](https://gitlab.com/gitlab-org/gitlab/blob/3a7857cc65bf736d198bdcb43cbf57da01f78330/lib/api/helpers.rb#L161)
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