Az ML v2: workspace name yml property is ignored

### Extension name (the extension in question)
Machine Learning v2

### Description of issue (in as much detail as possible)
workspace.yml:
```yml
name: myworkspace 123
```

```sh
az ml workspace create --file workspace.yml
```

When running the above command, although a workspace name is provided in my yaml file, still a workspace-name property is looked for as shell argument which is not expected.

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