[Feature flag] Rollout of `vue_project_members_list`

What

Enable the :vue_project_members_list feature flag to complete &4901 (closed)

GIF for context:

Owners

• Team: Manage Access
• Most appropriate slack channel to reach out to: #g_manage_access
• Best individual to reach out to: Peter Hegman

Expectations

What are we expecting to happen?

"Project" -> "Members" is rendered using Vue instead of HAML

What might happen if this goes wrong?

Project member list does not render correctly or functionality does not work as intended

What can we monitor to detect problems with this?

https://sentry.gitlab.net/gitlab/gitlabcom-clientside/?query=is%3Aunresolved+members

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

Roll Out Steps

• Enable on staging (/chatops run feature set vue_project_members_list 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 vue_project_members_list 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
• After the flag removal is deployed, clean up the feature flag by running chatops command in #production channel

Rollout plan

• 2021-02-08 16:00 UTC - gitlab.com gitlab-org/gitlab project
  • /chatops run feature set --project=gitlab-org/gitlab vue_project_members_list true
• 2021-02-09 00:00 UTC - gitlab.com 50%
  • /chatops run feature set vue_project_members_list 50 --actors
• 2021-02-11 17:00 UTC - gitlab.com 100%
  • /chatops run feature set vue_project_members_list true

Rollback Steps

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

/chatops run feature set vue_project_members_list false