【上传数据集】当前上传进度展示优化

多个数据集文件上传时，清晰地展示当前的上传进度。
目前是靠进度条的宽度大概估算。
另外，计算MD5、上传这2个动作，是复用了进度条的。上传较大文件时会看到进度条从0到满，再从0开始慢慢涨。

与 #2639 重复，关闭此单。

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Thank you for your continuous support to the Openl Qizhi Community AI Collaboration Platform. In order to protect your usage rights and ensure network security, we updated the Openl Qizhi Community AI Collaboration Platform Usage Agreement in January 2024. The updated agreement specifies that users are prohibited from using intranet penetration tools. After you click "Agree and continue", you can continue to use our services. Thank you for your cooperation and understanding.

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#2041 【上传数据集】当前上传进度展示优化