Fix AI Tools

[amteusch]

Motivation and context

Pretty simple changes should fix #4432

How has this been tested?

Only tested by building locally, following instructions from here. DEXTR

and YOLOv3

worked but these are the only ones I tried. On Ubuntu 20.04.4. Please advise about tests and change log, I did not do either of these from the checklist but I'm not sure if they are needed for this small fix

Checklist

• I submit my changes into the develop branch
• I have added a description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (read 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.
• I have updated the license header for each file (see an example below)

# Copyright (C) 2022 Intel Corporation
#
# SPDX-License-Identifier: MIT

[nmanovic]

@amteusch , thanks for the contribution. We will add a test on our side. Could you please add a line to CHANGELOG.md?

[amteusch]

@nmanovic added the line but I think I didn't rebase properly... let me know what needs fixing

[nmanovic]

@amteusch , could you please merge our develop branch into your branch? You should have only 2 files in 'Files changed'.

[amteusch]

@nmanovic better?

[nmanovic]

@amteusch , thanks for the great contribution! We will add a test to avoid such issues in the future.

[nmanovic]

@ivk , could you please prepare a regression test for issue? Please work with @kirill-sizov to implement a way to test serverless functions.

[amteusch]

I just installed cvat a few hours ago, and the fix does not seem to work. I still don't get a polygon, as in #4432, both with DEXTR and HRnet.

FYI, I checked my cvat/apps/lambda_manager/views.py and it contains the fix in this PR.

Have you installed the nuclio tool? I found I needed to follow additional instructions for the fix to work properly.

Not ruling out the possibilty of a bug, but maybe this could help narrow down the problem