Refactor NTP, support multiple NTP servers

[GheisMohammadi]

Issue

This PR refactors the NTP functionality to support querying multiple NTP servers and addresses the NTP timeout issue commonly encountered in localnet. The PR also includes minor adjustments to error handling and logging for better troubleshooting and debugging.

Key Changes:

• Multiple NTP Servers Support:

  • The NTP functionality now accepts a comma-separated list of NTP servers. It adds 0.beevik-ntp.pool.ntp.org to ntp servers as well.
  • It iterates through the provided servers, using the first successful response to determine time accuracy. If all servers fail, detailed error messages are returned.

• Timeout Issue Fix:

  • Fixed the issue where NTP queries would frequently time out in localnet.
  • Increased the NTP query timeout from 10 seconds to 30 seconds to provide more resilience in network conditions.

[Frozen]

Why it's better than just use time.Now() in localnet?

[GheisMohammadi]

Why it's better than just use time.Now() in localnet?

This PR addresses the issue for all networks and is not touching the logic. However, your suggestion is also great and valuable. I believe it’s acceptable to skip the time accuracy check on the localnet since all nodes are running on the same machine. I will apply this adjustment to the code.