Deploy the manifest table Background Migration to Staging and Production

After making the changes Add the Required Schema Migrations for the mani... (#1446 - closed) we need to deploy the registry with the new schema and background migration:

• Deploy the Background Migration to Staging:

  • The background migration targeting the manifests table should be deployed to the staging environment.
  • monitor its progress and ensure it runs smoothly and without issues.

• Deploy the Background Migration to Production:

  • After successful monitoring in staging, the background migration should be deployed to GitLab.com (production).

• Create a change request to Enable Background Migration Process in Production (see: gitlab-com/gl-infra/k8s-workloads/gitlab-com!4109 (diffs))

  • Enable Background migrations
  • Monitor its progress and ensure the migration completes successfully.