Add API endpoint to kill a workflow

[ashiklom]

Sometimes, we make boo boos (e.g., requesting 100 years of met download -- oops!). In those cases, it would be nice to have a shortcut to cancel a currently running workflow. Something like:

rpecanapi::kill_run(server, workflowid)
# Candidate API endpoint: <IP>/api/workflows/cancel?workflowid=XXXX

Currently, to cancel a run, you need to do some combination of:

• Terminate the R process in Portainer
• Purge the RabbitMQ queue
• Restart RabbitMQ

Would be nice to do this in a more convenient way.

[github-actions[bot]]

This issue is stale because it has been open 365 days with no activity.