AzureML pipeline designer pyarrow dependency while installing transformers

I was trying to import transformers in AzureML designer pipeline, it says for importing transformers and datasets the version of pyarrow needs to >=3.0.0, but then after upgrading pyarrow's version to 3.0.0 and importing transformers pyarrow version is reset to original version of 0.16.0. attaching few error samples. please have a look.

`Got exception when invoking script: 'RuntimeError: Failed to import transformers.trainer because of the following error (look up to see its traceback):To use datasets, the module pyarrow>=3.0.0 is required, and the current version of pyarrow doesn't match this condition.If you are running this in a Google Colab, you should probably just restart the runtime to use the right version of pyarrow.' azureml-designer-core 0.0.68 requires pyarrow==0.16.0, but you'll have pyarrow 3.0.0 which is incompatible.`

首先在 AzureML designer 管線中重現匯入，並將 transformers 和 datasets 的需求與 azureml-designer-core 0.0.68 進行比較，該版本將 pyarrow 固定為 0.16.0。完成標準是管線能夠匯入 transformers 和 datasets，同時不會降級 pyarrow 或產生版本衝突。

由索引模型根據 Issue 內容生成。