Deprecation of external registry as Gitlab Auth Endpoint

I saw the Gitlab Administration Documentation stating the External Gitlab container Registry as Gitlab Auth Endpoint is deprecated. So what features are going to be affected as part of this deprecation on the free self managed instance which uses an external registry. How could we migrate to the Gitlab Container Registry. Would this mean that we need to have all our internal images on Gitlab Registry? How is that possible? If not what is the alternative you suggest for this? Could someone put some light on this. This issue is intriguing me from so many days.

Thanks in Anticipation