[Consensus] increase commit syncer fetch timeouts (#18793)

## Description 

Validators with limited network need larger timeout for the requests to
succeed. In future, we will add support for partial results.

## Test plan 

n/a

---

## Release notes

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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): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

consensus/core/src/commit_syncer.rs

@@ -330,8 +330,8 @@ impl<C: NetworkClient> CommitSyncer<C> {
  fetch_state: Arc<Mutex<FetchState>>,
  commit_range: CommitRange,
  ) -> ConsensusResult<(Vec<TrustedCommit>, Vec<VerifiedBlock>)> {
- const FETCH_COMMITS_TIMEOUT: Duration = Duration::from_secs(10);
- const FETCH_BLOCKS_TIMEOUT: Duration = Duration::from_secs(60);
+ const FETCH_COMMITS_TIMEOUT: Duration = Duration::from_secs(30);
+ const FETCH_BLOCKS_TIMEOUT: Duration = Duration::from_secs(120);
  const FETCH_RETRY_BASE_INTERVAL: Duration = Duration::from_secs(1);
  const FETCH_RETRY_INTERVAL_LIMIT: u32 = 30;
  const MAX_RETRY_INTERVAL: Duration = Duration::from_secs(1);