RPC: Fix estimate gas RPC

[sieniven]

Summary

• This PR contains the correct fixes for eth_estimateGas RPC pipeline, to align with geth. Reference: https://github.com/ethereum/go-ethereum/blob/e2778cd59f04f7587c9aa5983282074026ff6684/eth/gasestimator/gasestimator.go
• The previous pipeline was aligned with geth's estimateGas simulator engine, which deferred slightly from geth's gasestimator pipeline.
• Resolves issue eth_estimateGas fails on empty address #2804 that has differing behavior from geth.
  • Align with geth - account balance checks should only occur when gas price and value fields are populated on the call request. (Reference: https://github.com/ethereum/go-ethereum/blob/e2778cd59f04f7587c9aa5983282074026ff6684/eth/gasestimator/gasestimator.go#L72-L80)
  • The old pipeline went into account balance checks as long as value fields were populated
• Add early short circuit of the gas estimate calculation and directly try transfer gas usage of 21_000 if the data field in the call context is empty.
• The lowest gas estimate range in the binary search algorithm is increased to a better gas estimate from the initial first tx execution with the highest gas estimate, using the actual gas usage from this tx execution.
• Add configuration to override the default estimate gas error ratio, which defaults to set as 15% (same as geth).
• Add early return out of binary search once gas error ratio is below the node's estimate gas error ratio configuration.

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