Description

NOTE: tests will fail for XINFO_STREAM command and that is expected and unrelated to this PR

Starts/stops tracking of hotkeys in a redis-server instance and reports top K such keys. Hotkeys are measured by two metrics - cpu execution time and total bytes read/written from the network. Reporting returns meaningful results only during or after stopping tracking.

https://docs.google.com/document/d/14BKzU7u0b-B54b18AbW3WZEZWvIDwGzMPjHFg-Tksl0

Checklist

• Does npm test pass with this change (including linting)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?