Support the 'when' setting for external diffs
- Matching Omnibus support MR: gitlab-org/omnibus-gitlab!3059 (merged)
- GitLab MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/25432
- GitLab issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/54670
We need to add the conditional support settings for external diffs to the charts.
Edited by DJ Mountney