Backport to branch(3.16) : Fix --no-header option not working for CSV exports

[feeblefakie]

This is an automated backport of the following:

• Original PR: Fix --no-header option not working for CSV exports #2924
• Backported commit: 6ad930f

Please merge this PR after all checks have passed.

[gemini-code-assist]

Summary of Changes

Hello @feeblefakie, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request backports a critical fix for the CSV export functionality, specifically addressing an issue where the --no-header option was not being honored. The changes ensure that when users request to omit the header row from CSV exports, the system correctly processes this instruction. Additionally, new tests have been introduced to thoroughly verify this behavior, enhancing the robustness of the data export feature.

Highlights

• Fix for CSV Export Header: The --no-header option for CSV exports now correctly prevents the header row from being written to the output file, resolving a previous bug where the header was always included.
• Conditional Header Writing: The CsvExportManager has been updated to conditionally write the CSV header based on the isExcludeHeaderRow() option, ensuring proper adherence to the export settings.
• New Unit Tests: Comprehensive unit tests have been added to CsvExportManagerTest to validate both scenarios: when the header is excluded and when it is included, ensuring the fix works as expected and preventing regressions.

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[gemini-code-assist]

Code Review

This pull request correctly fixes an issue where the --no-header option was not being respected for CSV exports. The change in CsvExportManager adds the necessary conditional logic, and the new tests in CsvExportManagerTest properly validate both cases (with and without a header). I have one suggestion to improve the new test helper method by using temporary files, which will make the tests more robust and prevent potential flakiness from parallel execution.