Finishing onboarding failing after group/project creation

Finishing onboarding is failing for a small perecentage of users. Current rates from logs look to be around 1 per day... sometimes none.

Screenshot_2025-03-20_at_9.06.38_AM

These seem to be failing due to some issue with Project authorizations. See this thread for current analysis: https://gitlab.com/gitlab-org/gitlab/-/issues/520090#note_2398552531

/cc @gitlab-org/growth/engineers

Edited by Doug Stull