Improve get_area() for polygons through Shoelace formula

[wonjuleee]

Summary

about 25 times faster computation compared to previous RLE mask based area computation

How to test

Checklist

• [x] I have added unit tests to cover my changes.​
• [ ] I have added integration tests to cover my changes.​
• [x] 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[bot]]

Codecov Report

Attention: Patch coverage is 84.61538% with 2 lines in your changes are missing coverage. Please review.

Please upload report for BASE (releases/1.7.0@232eea5). Learn more about missing BASE report.

Files	Patch %	Lines
src/datumaro/components/annotation.py	84.61%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## releases/1.7.0 #1507 +/- ## ================================================= Coverage ? 80.77% ================================================= Files ? 275 Lines ? 31514 Branches ? 6358 ================================================= Hits ? 25456 Misses ? 4644 Partials ? 1414 ``` | [Flag](https://app.codecov.io/gh/openvinotoolkit/datumaro/pull/1507/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit) | Coverage Δ | | |---|---|---| | [ubuntu-20.04_Python-3.10](https://app.codecov.io/gh/openvinotoolkit/datumaro/pull/1507/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit) | `80.76% <84.61%> (?)` | | | [windows-2022_Python-3.10](https://app.codecov.io/gh/openvinotoolkit/datumaro/pull/1507/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit) | `80.75% <84.61%> (?)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openvinotoolkit#carryforward-flags-in-the-pull-request-comment) to find out more.

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