Cypress test. Intelligent polygon cropping.

[dvkruchinin]

Motivation and context

Cypress test for #3021 feature

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have added 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) 2021 Intel Corporation
#
# SPDX-License-Identifier: MIT

[bsekachev]

@azhavoro

Please, look at this test

[coveralls]

Coverage increased (+0.01%) to 74.983% when pulling fa7a55c on dvkruchinin:dkru/cypress-test-case-67-intelligent-polygon-cropping into 691ed65 on openvinotoolkit:develop.

[azhavoro]

@bsekachev LGTM