#98347 covers updating distribution cluster settings in the kvserver pkg to be SystemOnly. This issue tracks changing any other cluster settings in the kvserver pkg to be SystemOnly.

The remaining cluster settings are depended on by tests using a non-system tenant to modify the setting. Updating these settings from TenantWritable or TenantReadOnly, to SystemOnly will require updating fixing tests.

kv.rangefeed.enabled
kv.closed_timestamp.target_duration
kv.closed_timestamp.side_transport_interval
kv.raft.command.max_size
kv.protectedts.reconciliation.interval
kv.protectedts.poll_interval
kv.protectedts.max_bytes
kv.gc_ttl.strict_enforcement.enabled
server.time_until_store_dead

The most depended (of tests using a non-system tenant) are kv.rangefeed.enabled or kv.closed_timestamp.target_duration.

Jira issue: CRDB-25464