Deprecate manual iteration management

Deprecation Summary

We deprecated manual iteration cadences. Automatic cadences will generate iterations automatically and should not allow the creation, update or deletion of iterations. As iteration management was GA, we need o follow the deprecation process

Breaking Change

After the deprecation period, users would stop having the ability to create/delete/update iterations manually. The only remaining manual management capability that will remain is the ability to update and iteration's description.

Affected Topology

Self-managed users and SaaS users

Affected Tier

Which tier is this feature available in?

Gitlab Premium and higher

Checklists

Labels

• This issue is labeled deprecation, and with the relevant ~devops::, ~group::, and ~Category: labels.
• This issue is labeled breaking change if the removal of the deprecated item will be a breaking change.

Timeline

Please add links to the relevant merge requests.

• As soon as possible, but no later than the third milestone preceding the major release (for example, given the following release schedule: 14.8, 14.9, 14.10, 15.0 – 14.8 is the third milestone preceding the major release):
  • !83892 (merged) - A deprecation entry has been created so the deprecation will appear in release posts and on the general deprecation page
  • !83907 (merged) - Documentation has been updated to add a note about the end-of-life and to mark the feature as deprecated
• On or before the major milestone: A removal entry has been created so the removal will appear on the removals by milestones page and be announced in the release post.
• On the major milestone:
  • The deprecated item has been removed.
  • If the removal of the deprecated item is a breaking change, the merge request is labeled breaking change.

Mentions

• Your stage's stable counterparts have been @mentioned on this issue. For example, Customer Support, Customer Success (Technical Account Manager), Product Marketing Manager.
  • To see who the stable counterparts are for a product team visit product categories
    • If there is no stable counterpart listed for Sales/CS please mention @timtams
    • If there is no stable counterpart listed for Support please mention @gitlab-com/support/managers
    • If there is no stable counterpart listed for Marketing please mention @cfoster3
• Your GPM has been @mentioned so that they are aware of planned deprecations. The goal is to have reviews happen at least two releases before the final removal of the feature or introduction of a breaking change.

Deprecation Milestone

Planned Removal Milestone

Links