Remove feature flag update_sbom_occurrences_vulnerabilities_on_cvs

What does this MR do and why?

Remove feature flag update_sbom_occurrences_vulnerabilities_on_cvs based on [Feature flag] Rollout of `update_sbom_occurren... (#514223 - closed) • Zamir Martins • 17.9

References

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• Related rollout issue: #514223 (closed)

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