Related: https://github.com/scylladb/scylla-enterprise/issues/2770 This commit adds the upgrade guide from ScyllaDB Open Source 5.2 to ScyllaDB Enterprise 2023.1. This commit does not cover metric updates (the metrics file has no content, which needs to be added in another PR). As this is an upgrade guide, this commit must be merged to master and backported to branch-5.2 and branch-2023.1 in scylla-enterprise.git. Closes #13294