fix(RHINENG-25661): IoP export when total CVEs ≤ 50 and json parsing

[Siasurai]

Summary by Sourcery

Implement batched, paginated IoP CVE export with proper data aggregation and format handling.

Bug Fixes:

• Ensure IoP CVE export works correctly when the total number of CVEs is small and when exporting JSON data.

Enhancements:

• Refactor the IoP export hook to fetch vulnerabilities in concurrent paginated batches with configurable batch size and shared parameter transformations.
• Simplify the systems opt-out hook implementation without changing its behavior.