Document managed versioning versions in changelog

What does this MR do?

Document the versions from where Managed Versioning took control over the tagging process.

This simple note in the changelog should will help us to better understand from what version each now product version tag was generated.

TODO

• Feature flag
  • Added feature flag:
  • This feature does not require a feature flag
• [-] I added the Changelog trailer to the commits that need to be included in the changelog (e.g. Changelog: added)
• I added unit tests or they are not required
• I added acceptance tests or they are not required
• I added documentation (or it's not required)
• I followed code review guidelines
• I followed Go Style guidelines