Python: [Feature]: workflow.as_agent() should default name and description to workflow's properties

### Description

When calling `workflow.as_agent()`, name has to be passed in manually, despite the fact that the workflow has a name (and a description). It would be good if they defaulted to the workflow's name and description

### Code Sample

```py
agent = workflow.as_agent()
assert agent.name === workflow.name # This should be true
```

### Language/SDK

Python