Use NetworkTopologyStrategy instead of SimpleStrategy (#3880)

## Motivation

`SimpleStrategy` is not recommended to be used in production

## Proposal

Use the recommended production setting

## Test Plan

CI + deploy network with this

## Release Plan

- Nothing to do / These changes follow the usual release cycle.

Author: ndr-ds

linera-views/src/backends/scylla_db.rs

@@ -811,7 +811,7 @@ impl AdminKeyValueStore for ScyllaDbStoreInternal {
         // Create a keyspace if it doesn't exist
         let query = format!(
             "CREATE KEYSPACE IF NOT EXISTS kv WITH REPLICATION = {{ \
-                'class' : 'SimpleStrategy', \
+                'class' : 'NetworkTopologyStrategy', \
                 'replication_factor' : {} \
             }}",
             config.common_config.replication_factor