Do not re-upload files when renamed locally

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### Feature description

Currently, renaming a file locally causes a re-upload of the file to nextcloud. With large files this quite burdensome. It would be great if instead of uploading the file again, nextcloud would just receive a rename command.

Currently an issue with nextcloud desktop client 3.5.1 (Ubuntu)

The issue names Nextcloud Desktop 3.5.1 on Ubuntu but no source file or test. Start by reproducing a local rename of a large file and tracing the desktop sync path; done means the server receives a rename operation without uploading the file contents, while existing sync behavior still works.

Written by the indexing model from the issue text.