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eb5b52f598
Changing DC or rack on a node which was already bootstrapped is, in case of vnodes, very unsafe (almost guaranteed to cause data loss or unavailability), and is outright not supported if the cluster has a tablet-backed keyspaces. Moreover, the possibility of doing that makes it impossible to uphold some of the invariants promised by the RF-rack-valid flag, which is eventually going to become unconditionally enabled. Get rid of the above problems by removing the possibility of changing the DC / rack of a node. A node will now fail to start if its snitch reports a different DC or rack than the one that was reported during the first boot. Fixes: scylladb/scylladb#23278 Fixes: scylladb/scylladb#22869 Marking for backport to 2025.1, as this is a necessary part of the RF-rack-valid saga Closes scylladb/scylladb#23800 * github.com:scylladb/scylladb: doc: changing topology when changing snitches is no longer supported test: cluster: introduce test_no_dc_rack_change storage_service: don't update DC/rack in update_topology_with_local_metadata main: make dc and rack immutable after bootstrap test: cluster: remove test_snitch_change
