[Issue] Add regions for Belarus

[m2-assistant]

This issue is automatically created based on existing pull request: #33922: Add regions for Belarus

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Description

Add regions for Belarus

Manual testing scenarios

1. Install Magento
2. Check table directory_country_region for Belarus regions.

Questions or comments

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)