Resync namespace traversal ids on staging only

What does this MR do and why?

This runs a data migration to fix some broken namespace traversal id's on staging.

This aims to fix this sentry error: https://new-sentry.gitlab.net/organizations/gitlab/issues/1956963/?environment=gstg&project=3&query=is%3Aunresolved&referrer=issue-stream&statsPeriod=1h&stream_index=0

undefined method `should_process_custom_roles?' for nil:NilClass (NoMethodError)

        next unless group.root_ancestor.should_process_custom_roles?
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I have verified that there are no orphan namespaces on production by rerunning this query.
Source of the query is from !200046 (comment 2674683085)

References

Related https://gitlab.com/gitlab-org/quality/e2e-test-issues/-/issues/927+
Related !200046 (merged)

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