Consider deleting comments on change records

Problem/Motivation

There are comments on change records for core and contrib projects. It would help the migration to know if they should be kept or not. Should all the comments be migrated? Should only comments for supported version be migrated?

This is a followup to #1663376: Disable comments on change records →

Steps to reproduce

Proposed resolution

TBD

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet