To keep links from ES live, we need to update the link builder from 9.0 forward to use our new link format
https://github.com/elastic/elasticsearch/blob/9c0709f386fee4154e930cb61a02868adebe8572/server/src/main/java/org/elasticsearch/common/ReferenceDocs.java#L203
VERSION_COMPONENT needs to stay in some form to future-proof the system. See discussion
Docs links also need to be refreshed to point to the equivalent doc in the new system. This could be undertaken by a writer when we understand the link format required