Enable coalesce in shred-fetch streamer::receiver (#6865)

core/src/shred_fetch_stage.rs

@@ -221,10 +221,10 @@ impl ShredFetchStage {
                     packet_sender.clone(),
                     recycler.clone(),
                     receiver_stats.clone(),
-                    None,  // coalesce
-                    true,  // use_pinned_memory
-                    None,  // in_vote_only_mode
-                    false, // is_staked_service
+                    Some(Duration::from_millis(5)), // coalesce
+                    true,                           // use_pinned_memory
+                    None,                           // in_vote_only_mode
+                    false,                          // is_staked_service
                 )
             })
             .collect();