Fixed:
- wrong location of tmp file when importing job annotations
- ```Traceback (most recent call last):
File
"/home/maya/Documents/cvat/.env/lib/python3.8/site-packages/rq/worker.py",
line 795, in work
      self.execute_job(job, queue)
File "/home/maya/Documents/cvat/cvat/rqworker.py", line 37, in
execute_job
      return self.perform_job(*args, **kwargs)
File
"/home/maya/Documents/cvat/.env/lib/python3.8/site-packages/rq/worker.py",
line 1389, in perform_job
      self.handle_exception(job, *exc_info)
File
"/home/maya/Documents/cvat/.env/lib/python3.8/site-packages/rq/worker.py",
line 1438, in handle_exception
      fallthrough = handler(job, *exc_info)
File "/home/maya/Documents/cvat/cvat/apps/engine/views.py", line 2233,
in rq_exception_handler
      rq_job.exc_info = "".join(
  AttributeError: can't set attribute
  ```

Resolves https://github.com/opencv/cvat/issues/5773
Resolves https://github.com/opencv/cvat/issues/5563

- root causes of the issues: 
  - the annotation file was uploaded to the server by tus protocol and
rq job was created but no one next requests for checking status were not
made. (e.g. user closed the browser tab)
  - the annotation file was uploaded to the server by tus protocol but
rq job has not yet been created (e.g cvat instance restarted)
  - tasks/projects creation from backups with the same name at the
same time by different users
Co-authored-by: NRoman Donchenko <roman@cvat.ai>
Co-authored-by: NMaxim Zhiltsov <zhiltsov.max35@gmail.com>