Find a way to re-enable changelog danger rule

Summary

In !732 (merged) we disabled changelog danger rule because it was breaking our release process(we modify CHANGELOG.md manually).

It's actually very useful rule, so I suggest we re-enable it.

Possible solutions

  1. add an exception to https://gitlab.com/gitlab-org/ruby/gems/gitlab-dangerfiles/-/blob/de46248059f8dfda36fabf48454a33c2324f34d0/lib/danger/plugins/changelog.rb (maybe based on project name or label? 🤔)
  2. move away from modifying changelog manually in MRs
Edited by Vladimir Shushlin