Fix import of pipelines with negative duration to ClickHouse
What does this MR do and why?
This MR fixes a bug that is currently affecting the import of pipelines into ClickHouse. There are certain pipelines with negative duration in the database, which is problematic since the CH column is unsigned.
Changelog: fixed
Part of #482930 (closed)
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Remove the fix in app/services/ci/click_house/data_ingestion/finished_pipelines_sync_service.rb, the tests should fail with the same error seen in Elastic logs:

