Fix nonce issue in test pipeline of network browser

[dmytrotkk]

Describe the bug
In the current version network-browser tests are designed to be executed in parallel to make the workflow faster. All transactions are executed simultaneously with pre-calculated nonces.

This sometimes causes an error where the same nonce is being reused.
The issue affects only test pipeline.

To Reproduce
Steps to reproduce the behavior:

1. Go to network-browser module
2. Run test pipeline

Logs:

initializing provider and contracts
  granting ROLE: VALIDATOR_MANAGER_ROLE
  granting ROLE: SCHAIN_TYPE_MANAGER_ROLE
  granting ROLE: SCHAIN_CREATOR_ROLE
  all roles granted
  going to register validator
  number of active validators: 1
  going to enable validator
  [11](https://github.com/skalenetwork/ima-agent/actions/runs/7630203789/job/20785351519#step:7:12)9 |         case "NUMERIC_FAULT":
  [12](https://github.com/skalenetwork/ima-agent/actions/runs/7630203789/job/20785351519#step:7:13)0 |         case "BUFFER_OVERRUN":
  121 |             error = new RangeError(message);
  122 |             break;
  123 |         default:
  124 |             error = new Error(message);
                            ^
  error: nonce has already been used (transaction="0x02f891827a695a843b9aca00843b9aca0e8301e18a944466c43ecfce7e973df4041b026a6bae18e4d00c80a4790ac49b0000000000000000000000000000000000000000000000000000000000000001c080a0feb0a2d5193b294695c11b9bb9f8b958145cd3e7699340184141787ff8681722a04f674bcd8f2edac26d6891d5[13](https://github.com/skalenetwork/ima-agent/actions/runs/7630203789/job/20785351519#step:7:14)ca040512e0465aae2cbd8f5dd67ad47badb588", info={ "error": { "code": -3[20](https://github.com/skalenetwork/ima-agent/actions/runs/7630203789/job/20785351519#step:7:21)00, "data": { "message": "Nonce too low. Expected nonce to be 91 but got 90." }, "message": "Nonce too low. Expected nonce to be 91 but got 90." } }, code=NONCE_EXPIRED, version=6.8.1)
   info: {
    "error": {
      "code": -32000,
      "message": "Nonce too low. Expected nonce to be 91 but got 90.",
      "data": {
        "message": "Nonce too low. Expected nonce to be 91 but got 90."
      }
    }
  }
   code: "NONCE_EXPIRED"
  
        at makeError (/home/runner/work/ima-agent/ima-agent/network-browser/node_modules/ethers/lib.esm/utils/errors.js:124:[21](https://github.com/skalenetwork/ima-agent/actions/runs/7630203789/job/20785351519#step:7:22))
        at /home/runner/work/ima-agent/ima-agent/network-browser/node_modules/ethers/lib.esm/providers/provider-jsonrpc.js:[26](https://github.com/skalenetwork/ima-agent/actions/runs/7630203789/job/20785351519#step:7:27)4:40
        at /home/runner/work/ima-agent/ima-agent/network-browser/tests/browser.test.ts:[33](https://github.com/skalenetwork/ima-agent/actions/runs/7630203789/job/20785351519#step:7:34):1
  (fail) browser module test > browse