Migrate pipeline stages indices
What does this MR do?
This merge request migrates pipeline stages indices in a background migration.
Does this MR meet the acceptance criteria?
-
Tests added for these changes -
Has been reviewed by Backend -
Has been reviewed by Database -
End-to-end tests pass
What are the relevant issue numbers?
Closes gitlab-org/gitlab-ce#43009
Edited by Grzegorz Bizon