Summary:
More context for the user.

Now the json output will have the record type (e.g. A vs AAAA).

Also cname records (aliases) are output, similar to nslookup.

Test Plan: Test cases updated.

Reviewers: yzhao, #engineering

Reviewed By: yzhao, #engineering

Differential Revision: https://phab.corp.pixielabs.ai/D6736

GitOrigin-RevId: 50eb291676fcd4e9b27987bb973ea58903c341fb