Fetcher to report caller name and package version

[pengyu-hou]

Summary

This PR will add a buildinfo to the online library. It will be used for reporting the caller name and fetcher version running in prod. In datadog, we could see the versions used in prod or staging:

Why / Goal

Improve fetcher's observability

Test Plan

• [ ] Added Unit Tests
• [x] Covered by existing CI
• [ ] Integration tested

Checklist

• [ ] Documentation update

Reviewers

@airbnb/zipline-maintainers