Include milliseconds in log timestamps

[levan-m]

What does this PR do?

Adds milliseconds to log timestamps before

{"level":"INFO","ts":"2024-05-24T19:05:12Z","logger":"setup","msg":"Version: v1.5.0"}
{"level":"INFO","ts":"2024-05-24T19:05:12Z","logger":"setup","msg":"Build time: 2024-03-25/17:45:26"}
{"level":"INFO","ts":"2024-05-24T19:05:12Z","logger":"setup","msg":"Git Commit: 3ce57899c62d71c1443df824a64dc9424645eda6"}
{"level":"INFO","ts":"2024-05-24T19:05:12Z","logger":"setup","msg":"Go Version: go1.19.13"}

after

{"level":"INFO","ts":"2024-05-24T19:01:08.444Z","logger":"setup","msg":"Version: v1.6.0-rc.4_89818557"}
{"level":"INFO","ts":"2024-05-24T19:01:08.444Z","logger":"setup","msg":"Build time: 2024-05-24/14:51:48"}
{"level":"INFO","ts":"2024-05-24T19:01:08.444Z","logger":"setup","msg":"Git Commit: 89818557d2e58ec91a4544702808abe2c8224550"}
{"level":"INFO","ts":"2024-05-24T19:01:08.444Z","logger":"setup","msg":"Go Version: go1.19.13"}

Motivation

What inspired you to submit this pull request?

Additional Notes

Anything else we should know when reviewing?

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

Describe your test plan

Write there any instructions and details you may have to test your PR.

Checklist

• [ ] PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• [ ] PR has a milestone or the qa/skip-qa label