I also met the same error as what you mentioned above:
root@test-orch-vm:~# heat stack-list WARNING (shell) "heat stack-list" is deprecated, please use "openstack stack list" instead
I also met the same error as what you mentioned above:
root@test- orch-vm: ~# heat stack-list
WARNING (shell) "heat stack-list" is deprecated, please use "openstack stack list" instead