Upload via drag and drop doesn't preserve time of file

[michaelstingl]

Steps to reproduce

1. Upload old file via drag and drop to demo.owncloud.com ==> "Modified" column shows original time from file ✅
2. Upload old file via drag and drop to web.owncloud.com ==> "Modified" column shows upload time from file ⚠️
3. Upload old file via drag and drop to ocis.owncloud.com ==> "Modified" column shows upload time from file ⚠️

Expected behaviour

Upload via ownCloud web should preserve the file time, same as oC10 does.

Actual behaviour

demo.owncloud.com	web.owncloud.com	ocis.owncloud.com

Client configuration

Browser:
Safari 15.6.1 (17613.3.9.1.16)

Operating system:
macOS 12.5.1 (21G83) Monterey

[JammingBen]

This has been fixed for Web, however, there is still a bug in the backend tus implementation. See owncloud/ocis#4559