Chore: Add remove-milestone workflow (#43086)
Chore: Add remove-milestone workflow (#43086)

* Add remove milestone action

* Update name

* Chore: use main branch from github action repository

Co-authored-by: Alexandra Vargas <ed82b5b5e5e944ef36fae84135314cd0114454a8@gmail.com>
grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana