More details of DatabricksStep outputs

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In my use case DatabricksStep generates a couple of files that should be passed to downstream steps using `PipelineData`. I am using python script from a local compute by specifying `python_script_name `. The script also parses arguments and outputs looked similar to examples in document shown below.

`If you specify a DataReference object as input with data_reference_name=input1 and a PipelineData object as output with name=output1, then the inputs and outputs will be passed to the script as parameters. This is how they will look like and you will need to parse the arguments in your script to access the paths of each input and output: "-input1","wasbs://test@storagename.blob.core.windows.net/test","-output1", "wasbs://test@storagename.blob.core.windows.net/b3e26de1-87a4-494d-a20f-1988d22b81a2/output1"`

So I am using following codes to dump a dummy file.
`
with open(args.output_name, 'w') as f:
json.dump({'hello':'world'}, f)
`
`PipelineData` is a file so no need to check the existence. The step didnot have any error and succeeded. But when I check the file from the blob storage there was not any folder generated (including the folder with Run_ID). This method works for `PythonScriptStep`. The difference is that in `PythonScriptStep`, the output argument is a mounted path like `/mnt/azureml/cr/j/******`

I also tested [OutputFileDatasetConfig](https://docs.microsoft.com/en-us/python/api/azureml-pipeline-core/%5Bhttps://aka.ms/pl-data-output-config%5D(https://aka.ms/pl-data-output-config)?view=azure-ml-py) as it is a recommended way from [doc](https://docs.microsoft.com/en-us/python/api/azureml-pipeline-core/azureml.pipeline.core.pipelinedata?view=azure-ml-py). No error, but have the same issue as `PipelineData` file was not generated.

Are there more details of how to use this inputs/outputs from python scripts?

---
#### Document Details

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* ID: 5d4d04b0-78b3-db32-a338-65f0ffc9167e
* Version Independent ID: 06721cca-fc1c-771c-c036-109712a1f7be
* Content: [azureml.pipeline.steps.databricks_step.DatabricksStep class - Azure Machine Learning Python](https://docs.microsoft.com/en-us/python/api/azureml-pipeline-steps/azureml.pipeline.steps.databricks_step.databricksstep?view=azure-ml-py#methods)
* Content Source: [AzureML-Docset/stable/docs-ref-autogen/azureml-pipeline-steps/azureml.pipeline.steps.databricks_step.DatabricksStep.yml](https://github.com/MicrosoftDocs/MachineLearning-Python-pr/blob/live/AzureML-Docset/stable/docs-ref-autogen/azureml-pipeline-steps/azureml.pipeline.steps.databricks_step.DatabricksStep.yml)
* Service: **machine-learning**
* Sub-service: **core**
* GitHub Login: @DebFro
* Microsoft Alias: **debfro**

從 AzureML-Docset/stable/docs-ref-autogen/azureml.pipeline.steps.databricks_step.DatabricksStep.yml 中的 DatabricksStep 文件來源開始，並檢閱連結的 PipelineData 和 OutputFileDatasetConfig 參考。重現所述的 local-compute Python 指令碼案例，並將其與 PythonScriptStep 的行為進行比較。完成的標準是文件清楚說明受支援的輸入和輸出路徑、檔案持久化，以及任何相關限制。

由索引模型根據 Issue 內容生成。