RPC: Fix and refactor gas fee and fee history RPCs

[sieniven]

Summary

1. Fixes to the eth_gasPrice RPC.

• Aligns eth_gasPrice implementation to geth (Ref: https://github.com/ethereum/go-ethereum/blob/master/eth/gasprice/gasprice.go)
• Fix error in old gasPrice pipeline that loops through current EVM block to the genesis block.
• Enable passing of configurable percentile parameter for the block service in calculating suggested priority fee (default at 60%)
• Add caching of the current tip's suggested fee per gas into block service.
• Add test for eth_gasPrice -> renamed feature_evm_rpc_fee_history to feature_evm_rpc_fee which now includes suggested gas price calculations test.
• Remove all unwraps and proper error handling.

2. Fixes to the eth_feeHistory RPC.

• Aligns eth_feeHistory implementation to geth (Ref: https://github.com/ethereum/go-ethereum/blob/master/eth/gasprice/feehistory.go)
• Fix error when returning requested sampled rewards from reward percentile values. Previously the sampled rewards did not account for the transaction's gas used. This is fixed in this PR, that returns the sampled transactions' priority fees that is weighted by their gas usage.

3. Housekeeping:

• Proper error handling in logevmaccontstate debug RPC and
• Re-enable correct tx gas fee test.

Implications

• Storage

  • Database reindex required
  • Database reindex optional
  • Database reindex not required
  • None

• Consensus

  • Network upgrade required
  • Includes backward compatible changes
  • Includes consensus workarounds
  • Includes consensus refactors
  • None