[Bugfix:Autograding] Fix BadZipError (#8288)
[Bugfix:Autograding] Fix BadZipError (#8288)

* fix: todo queue file presents before zips

* fix: rm remote queue file

* fix: rename after copying

* fix: json decode err
Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty