[consensus] Enable distributed vote scoring in testnet (#19503)

## Release notes

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- [X] Protocol: Enable distributed vote scoring in testnet
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

crates/sui-protocol-config/src/lib.rs

@@ -180,6 +180,7 @@ const MAX_PROTOCOL_VERSION: u64 = 60;
 // Version 59: Enable round prober in consensus.
 // Version 60: Validation of public inputs for Groth16 verification.
 //             Enable configuration of maximum number of type nodes in a type layout.
+//             Switch to distributed vote scoring in consensus in testnet
 
 #[derive(Copy, Clone, Debug, Hash, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 pub struct ProtocolVersion(u64);
@@ -2781,6 +2782,12 @@ impl ProtocolConfig {
                 60 => {
                     cfg.max_type_to_layout_nodes = Some(512);
                     cfg.feature_flags.validate_identifier_inputs = true;
+
+                    if chain != Chain::Mainnet {
+                        // Enable distributed vote scoring for testnet
+                        cfg.feature_flags
+                            .consensus_distributed_vote_scoring_strategy = true;
+                    }
                 }
                 // Use this template when making changes:
                 //

crates/sui-protocol-config/src/snapshots/sui_protocol_config__test__Testnet_version_60.snap

@@ -60,6 +60,7 @@ feature_flags:
   soft_bundle: true
   enable_coin_deny_list_v2: true
   rethrow_serialization_type_layout_errors: true
+  consensus_distributed_vote_scoring_strategy: true
   consensus_round_prober: true
   validate_identifier_inputs: true
 max_tx_size_bytes: 131072