[docs] Add documents for Aliyun OSS offload

[yufan022]

Fixes #8887

Motivation

Add Aliyun OSS offload document.

Modifications

add document

[Anonymitaet]

To show it on the sidebar, you need to update the site2/website/sidebars.json file.

[Anonymitaet]

@yufan022 will this apply to 2.7.1?

[Huanli-Meng]

leave my comments. PTAL

[yufan022]

@yufan022 will this apply to 2.7.1?

No, 2.8.0 or later

[Jennifer88huang-zz]

@yufan022 Thank you very much for your contribution.
I notice that there are some comments that haven't dealt with. Will you incorporate those comments later or will you allow us to edit directly in this md file? Which method do you prefer?

[Anonymitaet]

@yufan022 could you please check the comments and update the doc if necessary? Thanks

[Anonymitaet]

@yufan022 any progress?

[Anonymitaet]

@yufan022 could you please check the comments and update the doc if necessary? Thanks

[yufan022]

@yufan022 could you please check the comments and update the doc if necessary? Thanks

Sorry for the late, I will finish the work.

[yufan022]

@yufan022 Thank you very much for your contribution.
I notice that there are some comments that haven't dealt with. Will you incorporate those comments later or will you allow us to edit directly in this md file? Which method do you prefer?

Both are fine, You can edit it directly.

[yufan022]

@Anonymitaet @jennifer88huang @Huanli-Meng PTAL.
Apologize again for my delay.

[Anonymitaet]

@yufan022 thanks for your feedback. Left one minor suggestion.