[Feature] [DSS-Workflow] Added workflow version script file download function

[yuankang134]

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• I had searched in the issues and found no similar feature requirement.

Problem Description

Added workflow version script file download function
(新增工作流版本的脚本文件下载功能)

Description

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Use case

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solutions

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Anything else

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Are you willing to submit a PR?

• Yes I am willing to submit a PR!