fix(l1): fix the transactions spammer count diff with our node

[rodrigo-o]

Motivation

As explained in this comment the spammer has a 2-phase execution, where txcount * accounts define the number of transactions added in the second phase of each round. We were recieving significant less transactions in the secod phase, near accounts in number

Description

This PR solves the issue adding a implementation of eth_maxPriorityFeePerGas, which after debuging proved to be the cause of the diminished number of transactions reaching our node. After an initial implementation we can see the node working as expected, here is a comparision:

Before eth_maxPriorityFeePerGas	After eth_maxPriorityFeePerGas

For the current implementation we extracted the common logic betweeneth_GasPrice and eth_maxPriorityFeePerGas. This was inspired in how geth managed both. I moved the logic from gas_price to a common module (fee_calculator) that calculates the gas tip; previously we were estimating the gas price, now the tip, this was the only change to the logic. Now both RPC calls depend on this logic, the difference being gas_price adding the base_fee while max_priority_fee doesn't. I tried to avoid as much changes as possible to the previous implementation of gas_price, this is something that we might want to look further in the future.

Resolves #1449

[github-actions]

+-------------------------------------------------------------------------------+-------+------+
| File                                                                          | Lines | Diff |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/eth/fee_calculator.rs   | 79    | +79  |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/eth/gas_price.rs        | 124   | -222 |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/eth/max_priority_fee.rs | 109   | +109 |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/eth/mod.rs              | 162   | +154 |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/rpc.rs                  | 434   | +1   |
+-------------------------------------------------------------------------------+-------+------+

Total lines changed: +565

[mpaulucci]

🚀