[Feature flag] Enable value stream analytics horizontal navigation

What

Remove the :value_stream_analytics_path_navigation feature flag ...

Owners

• Team: groupoptimize
• Most appropriate slack channel to reach out to: #g_manage_optimize
• Best individual to reach out to: @ekigbo @wortschi

Expectations

What are we expecting to happen?

The VSA horizontal navigation will be available, replacing the previous vertical navigation that appears in the stage table

What might happen if this goes wrong?

The UI changes arent reflected correctly

What can we monitor to detect problems with this?

The VSA feature is available on all groups ie: https://gitlab.com/groups/gitlab-org/-/analytics/value_stream_analytics

Beta groups/projects

If applicable, any groups/projects that are happy to have this feature turned on early. Some organizations may wish to test big changes they are interested in with a small subset of users ahead of time for example.

• manage/optimize group
• gitlab-org/gitlab project
• gitlab-org/gitlab-com groups

Roll Out Steps

• Enable on staging (/chatops run feature set value_stream_analytics_path_navigation true --staging)
• Test on staging
• Ensure that documentation has been updated
• Enable on GitLab.com for individual groups/projects listed above and verify behaviour (/chatops run feature set --project=gitlab-org/gitlab value_stream_analytics_path_navigation true)
• Coordinate a time to enable the flag with the SRE oncall and release managers
  • In #production mention @sre-oncall and @release-managers. Once an SRE on call and Release Manager on call confirm, you can proceed with the rollout
• Announce on the issue an estimated time this will be enabled on GitLab.com
• Enable on GitLab.com by running chatops command in #production (/chatops run feature set feature_name true)
• Cross post chatops Slack command to #support_gitlab-com (more guidance when this is necessary in the dev docs) and in your team channel
• Announce on the issue that the flag has been enabled
• Remove feature flag and add changelog entry. Ensure that the feature flag definition YAML file has been removed in the same MR that is removing the feature flag from the code
• After the flag removal is deployed, clean up the feature flag by running chatops command in #production channel

Rollback Steps

• This feature can be disabled by running the following Chatops command:

/chatops run feature set --project=gitlab-org/gitlab value_stream_analytics_path_navigation false