Add smoke tests for mainnet and testnet protocol configs (#22132)

## Description 

Describe the changes or additions included in this PR.

## Test plan 

How did you test the new or updated feature?

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] gRPC:
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

Author: mystenmark

crates/sui-benchmark/tests/simtest.rs

@@ -38,7 +38,7 @@ mod test {
         register_fail_point_async, register_fail_point_if, register_fail_points, sim_test,
     };
     use sui_protocol_config::{
-        ExecutionTimeEstimateParams, PerObjectCongestionControlMode, ProtocolConfig,
+        Chain, ExecutionTimeEstimateParams, PerObjectCongestionControlMode, ProtocolConfig,
         ProtocolVersion,
     };
     use sui_simulator::tempfile::TempDir;
@@ -97,10 +97,40 @@ mod test {
     #[sim_test(config = "test_config()")]
     async fn test_simulated_load_with_reconfig() {
         sui_protocol_config::ProtocolConfig::poison_get_for_min_version();
-        let test_cluster = build_test_cluster(4, 1000, 1).await;
+        let test_cluster = build_test_cluster(2, 3000, 1).await;
         test_simulated_load(test_cluster, 60).await;
     }
 
+    #[sim_test(config = "test_config()")]
+    async fn test_mainnet_config() {
+        chain_config_smoke_test(Chain::Mainnet).await;
+    }
+
+    #[sim_test(config = "test_config()")]
+    async fn test_testnet_config() {
+        chain_config_smoke_test(Chain::Testnet).await;
+    }
+
+    async fn chain_config_smoke_test(chain: Chain) {
+        sui_protocol_config::ProtocolConfig::poison_get_for_min_version();
+        let test_cluster = init_test_cluster_builder(2, 3000)
+            .with_authority_overload_config(AuthorityOverloadConfig {
+                // Disable system overload checks for the test - during tests with crashes,
+                // it is possible for overload protection to trigger due to validators
+                // having queued certs which are missing dependencies.
+                check_system_overload_at_execution: false,
+                check_system_overload_at_signing: false,
+                ..Default::default()
+            })
+            .with_submit_delay_step_override_millis(3000)
+            .with_num_unpruned_validators(1)
+            .with_chain_override(chain)
+            .build()
+            .await
+            .into();
+        test_simulated_load(test_cluster, 30).await;
+    }
+
     // Ensure that with half the committee enabling v2 and half not,
     // we still arrive at the same root state hash (we do not split brain
     // fork).