Rover state list / show

Hello,

I am using rover version 1.4.6 and the execution of 'state list', 'state show' doesn't work anymore.

Here is the command I execute

```
rover -lz /tf/caf/landingzones/caf_solution -env xxx -level level3 -tfstate_subscription_id zzzz -tfstate snapshots.tfstate -target_subscription aaaa -var-folder /tf/caf/configuration/xxx/level3/elk/snapshots -a "state list"
```

It just doesn't do anything.

```
@calling_get_logged_user_object_id
- AZURE_ENVIRONMENT: AzureCloud
- ARM_ENVIRONMENT: public
Initalizing az cloud variables
- logged in user objectId: xxxx (gevraud@xxx)
Initializing state with user: gevraudxxxx

launchpad: launchpad already installed

You can deploy a landingzone with the rover by running:
rover -lz [landingzone_folder_name] -a [plan|apply|destroy|validate|refresh|graph|import|output|taint|untaint|'state list'|'state rm'|'state show']

@calling clean_up_variables
cleanup variables
clean_up backend_files
```

I feel it was working well in version 1.3.1.

Do I miss something / did the syntax change ?

Regards