Fix tus loading if multiple apache processes are used

[azhavoro]

Motivation and context

How has this been tested?

Manually by set --processes 3 for mod_wsgi settings

Checklist

• I submit my changes into the develop branch
• I have added a description of my changes into the CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (see GitHub docs)
• I have increased versions of npm packages if it is necessary
  (cvat-canvas,
  cvat-core,
  cvat-data and
  cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[nmanovic]

@azhavoro , need to add a line into CHANGELOG. Do we have a test for TUS upload feature?

[azhavoro]

@azhavoro , need to add a line into CHANGELOG. Do we have a test for TUS upload feature?

We have tus test
https://github.com/opencv/cvat/blob/develop/tests/cypress/e2e/actions_tasks3/case_112_tus_upload.js

[klakhov]

I see one failed test, but it looks like its unstable test. It failed in one of my pr's too.