Fix not saving extra images of PointCloud in datumaro format

[cih9088]

Summary

The extra images were not saved during Datumaro format export.

How to test

Checklist

• I have added unit tests to cover my changes.​
• I have added integration tests to cover my changes.​
• I have added the description of my changes into CHANGELOG.​
• I have updated the documentation accordingly

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) 2023 Intel Corporation
#
# SPDX-License-Identifier: MIT

[vinnamkim]

Can we have a test for it?

[vinnamkim]

Can we have a test for it?

We could use this asset, https://github.com/openvinotoolkit/datumaro/tree/develop/tests/assets/sly_pointcloud_dataset

[cih9088]

Can we have a test for it?

If only this part is replaced with test.assertEqual(item_a.media, item_b.media) to compare contents.

As you commented in the code block, just replacing it causes lots of error. The Image refactoring branch I'm working on fixed it and hopefully it got merged soon.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (ddde11d) 78.86% compared to head (c3dabc5) 78.86%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #918   +/-   ##
========================================
  Coverage    78.86%   78.86%           
========================================
  Files          215      215           
  Lines        25202    25204    +2     
  Branches      5043     5043           
========================================
+ Hits         19876    19878    +2     
  Misses        4191     4191           
  Partials      1135     1135           

Flag	Coverage Δ
macos-11_Python-3.8	?
ubuntu-20.04_Python-3.8	78.86% <100.00%> (+<0.01%)	⬆️
windows-2019_Python-3.8	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
datumaro/plugins/data_formats/datumaro/exporter.py	94.95% <100.00%> (+0.04%)	⬆️

... and 2 files with indirect coverage changes

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[vinnamkim]

LGTM.

[sooahleex]

Looks good to me.

[vinnamkim]

LGTM.

[cih9088]

Can we have a test for it?

If only this part is replaced with test.assertEqual(item_a.media, item_b.media) to compare contents.

As you commented in the code block, just replacing it causes lots of error. The Image refactoring branch I'm working on fixed it and hopefully it got merged soon.

Fixed in #921