Support multiple labels for kaggle format

[sooahleex]

Summary

• Ticket no.152153
• Support multi labels for kaggle dataset

How to test

Add unit tests

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) 2024 Intel Corporation
#
# SPDX-License-Identifier: MIT

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 3 lines in your changes missing coverage. Please review.

Please upload report for BASE (releases/1.9.0@6ec38e5). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/datumaro/plugins/data_formats/kaggle/base.py	92.30%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##             releases/1.9.0    #1607   +/-   ##
=================================================
  Coverage                  ?   81.07%           
=================================================
  Files                     ?      278           
  Lines                     ?    32545           
  Branches                  ?     6619           
=================================================
  Hits                      ?    26385           
  Misses                    ?     4703           
  Partials                  ?     1457           

Flag	Coverage Δ
ubuntu-20.04_Python-3.10	81.06% <92.30%> (?)
windows-2022_Python-3.10	81.04% <92.30%> (?)

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