Try replacing AnvilManager's logic by viem/prool

[ITZSHOAIB]

Try replacing the AnvilManager's logic by using prool

Reference:

import { createServer } from 'prool'
import { anvil } from 'prool/instances'

const server = createServer({
  instance: anvil(),
})

await server.start();
await server.stop();
// Instances accessible at:
// "http://localhost:8545/1"
// "http://localhost:8545/2"
// "http://localhost:8545/3"
// "http://localhost:8545/n"