$ mistral action-execution-delete <action_execution_id>
NOTE:
* By default, users can't perform such operation, unless the
'allow_action_execution_deletion' is set to True on server side.
* Only ad-hoc action-execution can be deleted.
Change-Id: Iad0bfb0c2f688928d1e1bd8c41fcf90acd94cd66
Implements: blueprint mistralclient-action-execution-deletion