post
https://api2.pennsieve.io/compute/workflows/runs//cancel
Cancels a running workflow execution. Sets the run status to CANCELING,
calls the compute gateway to stop all Step Functions executions and
running ECS tasks, then sets the final status to CANCELED.
The creator of the run, compute node owners, and account owners can
cancel it. Returns 409 if the run is already in a terminal state
(CANCELED, SUCCEEDED, FAILED).
Lambda processors cannot be stopped mid-execution and will run to
completion or timeout.