[Cells 1.0] Default Work Item Types: Ensure work item type IDs are constant 1-9
Create a database migration to ensure work item types are constant - 1, 2, 3, 4, 5, 6, 7, 8, 9 on gitlab.com at the very least, and eventually everyone else including self-hosted customers.
Define the default work item type IDs in the application logic.
See https://gitlab.com/gitlab-org/gitlab/-/issues/459904 and #423483 and https://gitlab.slack.com/archives/C3NBYFJ6N/p1714539272456519 (internal only, 90 days) for some prior discussion on this.
Edited by charlie ablett