Enable vulnerability_signatures_dedup_by_type by default

What does this MR do and why?

Enables vulnerability_signatures_dedup_by_type which was introduced in Deduplicate vulnerability findings only based o... (!179522 - merged) • Julian Thome • 17.11.

The feature is already rolled out to production environments in [Feature flag] Enable vulnerability_signatures_... (#525071 - closed) • Julian Thome • 17.11 • On track

note: We had to change the FF type from derisk to beta, in order to flip the feature flag to be enabled by default.

References

• Deduplicate vulnerability findings only based o... (!179522 - merged) • Julian Thome • 17.11
• [Feature flag] Enable vulnerability_signatures_... (#525071 - closed) • Julian Thome • 17.11 • On track

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