Deprecate the legacy team labels

Summary

We will deprecate the following legacy team labels according to the new rollout plan at #172 (closed) by adding a [DEPRECATED] suffix to them:

• ~Manage
• ~Plan
• ~Create
• ~Verify
• ~Package
• ~Release
• ~Configure
• ~Serverless
• ~Monitor
• ~Secure
• ~Defend
• ~Growth
• ~Gitaly
• ~Gitter
• ~Distribution
• ~Geo
• ~Memory
• ~Ecosystem

Groups should be using exclusively their group and stage labels from now on.

Action items

On 2019-08-13

• Announce the deprecation on the company call, #development, #product, and Engineering Week in Review.

On 2019-08-19, we will deprecate the team labels by adding a [DEPRECATED] suffix to them (#254 (closed)). Please use the Stage (devops::xxx) and Group (group::xxx) labels instead.

• This is part of an effort to transition from team labels to stage & group labels: #172 (comment 201666990)
• We are tackling the remaining edge cases where more than one legacy team labels exists after this #242.

Before 2019-08-19

• Triage automation: create or update the stage/group/categories in https://gitlab.com/gitlab-org/quality/triage-ops/blob/master/lib/devops_labels.rb. => !255 (merged)
• Dashboard creation: update the teams in https://gitlab.com/gitlab-org/gitlab-insights/blob/master/lib/gitlab_insights.rb. => gitlab-org/gitlab-insights!151 (merged)
• (If applicable) Label migration on existing issues and merge requests: apply the new label to opened & closed issues, and open & merged merge requests.
• The native Insights configuration
• The Periscope dashboards
• Update https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/contributing/issue_workflow.md => https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/31811

On 2019-08-19

• Archive the old labels with renaming and adding "DEPRECATED" at the end of the label names.
• (If applicable) Delete the old dashboard views using the deprecated labels.