Remove some more repos from CI
Remove some more repos from CI

- `transition-config`, `govuk-secrets`, `govuk-user-reviewer` and
  `email-alert-monitoring` use GitHub Actions for CI now.
- `govuk-content-schemas-test-helpers` is an archived repo.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet