Display past abft scores

[Marcin-Radecki]

This PR adds support for displaying past ABFT scores, via using existing useAbftScores hook. The Staking / Validator stats page was reworked:

• There are 4 sections now, so data is better organized and not everything is loaded at once
• Grepping past ABFT scores is now possible for whatever era, as well as past validator performance, so much quicker loading than hardcoded past 4 eras. One component MinMaxAndToggle was extracted to it can be used in the context of querying past eras or sessions.
• cool Gauge displayed instead of plain label!

Still, there's a code duplication between FinalizerHistoricPerformance and ValidatorHistoricPerformance, which can be further reduced by extracting additional component. For now I proposed separate, to divide heavy-computation of querying past validator/abft scores separately.

Other techncial debt reduced:

• more common code moved to utils,
• removed not needed feature which checks if chain name was Aleph - it's not longer needed as azero.dev displays only AlephZero chains,
• packages/page-staking/src/Performance/useEraSessionBoundaries.tsx now returns current sessions and ending session of the current era, so no undefined anymore

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