Relax finalty-gated caches to F3 or finality calculator

[LesnyRumcajs]

Summary

Right now in finality-gated caches we use just whatever is set for the chain (900). This is okay but we can do better with F3 or finality calculator - we'd be able to fill the caches faster.

Completion Criteria

• sweep through finality-gated caches and see where more relaxed restriction could be used; be skeptical, there might be places where we can't do it for some reason (can't think of any off the top of my head, though)
• implement the changes
• tests!

Additional Links & Resources