Remove Contributor Success ping and relabel ~"workflow::in dev"

What does this MR do and why?

Pinging Contributor Success every time a merge request is left in workflowready for review with no reviewer assigned is causing quite a lot of noise.

This MR removes the ping.

We have also seen, in the majority of cases the reviewer has simply forgotten to change to workflowin dev, so we will now automatically relabel instead.

Relates to https://gitlab.com/gitlab-org/quality/contributor-success/team-task/-/issues/177+

Expected impact & dry-runs

https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/3755865811

Action items

• If adding environment variables for reactive processors, update config/triage-web.yaml and .gitlab/ci/triage-web.yml
• (If applicable) Add documentation to the handbook pages for Triage Operations =>
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @person_or_group =>
  • Relevant Slack channels =>
  • Engineering week-in-review