[Bug] When we delete files that was uploaded by "anonymous" user, it doesn't appear in the trash

[shepilov]

To Reproduce

1. User 1 sharer folder by the link
2. User2 uploads some files to this folder
3. User1 deletes these files
4. These files are nowhere

Rules to implement

• If Alice creates a shared folder (shared folder - to find Alice - is the deepest one shared), and:
  • Anon uploads file, * deletes it -> trash of Alice
  • Bob uploads file, * deletes it -> trash of Bob