parlia: opt consensus perf and FF stability;

[galaio]

Description

This PR primarily optimizes consensus performance and FF stability, enabling reth-bsc to produce blocks and complete finalization in lower latency scenarios.

Specific optimizations:

1. Added Fast Attestation feature, see: BEP648: Enhanced Fast Finality via InMemory Voting Pool bsc#3520;
2. Supported delayed sealing, optimized tokio scheduling, and improved FF stability;
3. Used system_contracts cache to avoid duplicate generation;
4. Optimized FF logic to prevent initial Attestation from failing to generate.
5. Fixed some other corner cases, and optimized logs and metrics;

Changes

Notable changes:

• parlia: opt consensus perf and FF stability;
• ...