Duplicated calculation in `eth_estimateGas`.

[yangby-cryptape]

Description

When call eth_estimateGas to estimate gas used, the gas calculation for create-tx, call-tx and tx.data are incorrect and duplicated.

https://github.com/axonweb3/axon/blob/f692b865bda85cbd0c8f028f8aca8ae0d793465b/core/executor/src/lib.rs#L81-L85

https://github.com/axonweb3/axon/blob/f692b865bda85cbd0c8f028f8aca8ae0d793465b/core/executor/src/lib.rs#L100

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For Example

• Do simplest transfer transaction.	Data Size[^1]	Estimated in Axon	Actual in Axon	Estimated in Geth	Actual in Geth
  0	42000	21000	21000	21000
  1	42084	21016	21016	21016
  2	42168	21032	21032	21032

  [^1]: Set the transaction.data to be N non-zero bytes.

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Appendix: More Unit Tests are Required

• Call eth_estimateGas for a transaction whose gas is set to a value that greater than u64::MAX, will cause Axon panic.

  https://github.com/axonweb3/axon/blob/f692b865bda85cbd0c8f028f8aca8ae0d793465b/core/api/src/adapter.rs#L210

  There is already an in-process PR.

  I just record it here, and request a unit test for it, after that PR merged.