Support s3-multipart feature #5554

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Feature description

The Nextcloud server 26.0.0 has added s3-multipart support for DAV: nextcloud/server#27034. It requires the client to make changes to support this feature too, as described in the pull request nextcloud/server#27034.

When using the s3-multipart feature, uploading big files to a Nextcloud server using S3 will be significantly faster. It is because the process of assembling chunks will take place on S3. It can also help reduce the cost on S3.

Implement this feature can solve this issue: nextcloud/server#19414
And can also solve: nextcloud/server#19223, nextcloud/server#17992