Enhancement/sync node broadcast txs

[DmytroNazarenko]

Enabling transactions broadcast for sync nodes

This PR enables functionality for broadcasting transactions from sync/archive nodes to the core nodes.

Main changes:

• Turning on eth_sendTransaction and eth_sendRawTransaction APIs on sync/archive nodes
• Enabling transaction broadcasting from sync/archive nodes to validator nodes

Testing

1. Add unit test send_raw_tx_sync that is sending tx to sync node and checking that it is appeared in transaction queue
2. Run end-to-end test on devnet:
   • Spin up 4-node chain + sync node
   • Connect Remix to sync node endpoint
   • Write simple Simple contract and deploy it through Remix
   • Send a store(10) tx -> tx should pass
   • Check tx receipt on core nodes
   • Make a retrieve call -> should return 10

Contract for E2E testing:

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

/**
 * @title Storage
 * @dev Store & retrieve value in a variable
 */
contract Storage {

    uint256 number;

    /**
     * @dev Store value in variable
     * @param num value to store
     */
    function store(uint256 num) public {
        number = num;
    }

    /**
     * @dev Return value 
     * @return value of 'number'
     */
    function retrieve() public view returns (uint256){
        return number;
    }
}

[github-actions]

SUGGESTIONS BEFORE MERGE:

1. Build custom container here: https://github.com/skalenetwork/skaled/actions?query=workflow%3A%22Custom+Docker+and+Binary%22
2. Test it here: https://github.com/skalenetwork/skale-ci-integration_tests/actions?query=workflow%3A%22Skaled+Nightly+Tests%22
3. Edit VERSION file appropriately to your changes!
   See https://skalelabs.atlassian.net/wiki/spaces/SKALE/pages/2444951553/Branching+instructions

[codecov]

Codecov Report

Attention: 39 lines in your changes are missing coverage. Please review.

Comparison is base (f7c560a) 45.50% compared to head (a2d5363) 45.59%.

Additional details and impacted files

@@             Coverage Diff             @@
##           v3.18.0    #1651      +/-   ##
===========================================
+ Coverage    45.50%   45.59%   +0.08%     
===========================================
  Files          356      356              
  Lines        51720    51709      -11     
===========================================
+ Hits         23537    23576      +39     
+ Misses       28183    28133      -50