[Feature flag] Rollout of `ci_commit_pipeline_mini_graph_vue`

What

Feature rollout for #300403 (closed)

Remove the : ci_commit_pipeline_mini_graph_vue feature flag which controls if the mini pipeline in the commit page is shown using Vue instead of HAML. First introduced by !55363 (merged)

Before	After (ci_commit_pipeline_mini_graph_vue enabled)

Owners

• Team: ~"group::continuous integration"
• Most appropriate slack channel to reach out to: #g_ci-pa-engineering (x-post to #s_verify_fe if needed)
• Best individual to reach out to: @mrincon

Expectations

What are we expecting to happen?

What might happen if this goes wrong?

What can we monitor to detect problems with this?

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.

• gitlab-org/gitlab project
• gitlab-org/gitlab-ui project

Roll Out Steps

• Enable on staging (/chatops run feature set ci_commit_pipeline_mini_graph_vue 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 ci_commit_pipeline_mini_graph_vue true
  • /chatops run feature set --project=gitlab-org/gitlab-ui ci_commit_pipeline_mini_graph_vue 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
  • /chatops run feature set ci_commit_pipeline_mini_graph_vue 25 --actors
  • /chatops run feature set ci_commit_pipeline_mini_graph_vue 50 --actors
  • /chatops run feature set ci_commit_pipeline_mini_graph_vue 75 --actors
  • /chatops run feature set ci_commit_pipeline_mini_graph_vue 100 --actors
• 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 ci_commit_pipeline_mini_graph_vue 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 ci_commit_pipeline_mini_graph_vue false