[EVM-697]: Implement eth_maxPriorityFeePerGas

[goran-ethernal]

Description

This PR implements eth_maxPriorityFeePerGas json rpc endpoint.

Parameters:

• This method does not accept any parameters.

Returns:

• result string - The hex value of the priority fee needed to be included in a block (in wei).

Request:

curl https://link-to-some-node/ \
-X POST \
-H "Content-Type: application/json" \
--data '{"method":"eth_maxPriorityFeePerGas","params":[],"id":1,"jsonrpc":"2.0"}'

Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xbebc200"
 }

The eth_maxPriorityFeePerGas rpc point returns an estimated fee per gas, indicating the amount you can pay as a priority fee (tip) in order to have a transaction in the current block.

Edge implementation follows the go-ethereum implementation.

Changes include

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)

Checklist

• I have assigned this PR to myself
• I have added at least 1 reviewer
• I have added the relevant labels
• I have updated the official documentation
• I have added sufficient documentation in code

Testing

• I have tested this code with the official test suite
• I have tested this code manually

[vcastellm]