This commit adds an upgrade guide from ScyllDB 6.0
to ScyllaDB Enterprise 2024.2.
Fixes https://github.com/scylladb/scylladb/issues/20063
Fixes https://github.com/scylladb/scylladb/issues/20062
Refs https://github.com/scylladb/scylla-enterprise/issues/4544
(cherry picked from commit 3d4b7e41ef)
Closes scylladb/scylladb#21620