Deflake TestQueued on slower runners (#6077)

## Motivation

On slower runners this test fails regularly because not enough clients in the simulated mesh are able to respond to the ping within a second. This slightly increases the queue size so fewer pings fail and hopefully the expected number of pings are able to succeed.

p2p/server/server_test.go

@@ -190,7 +190,7 @@ func TestQueued(t *testing.T) {
 		WrapHandler(func(_ context.Context, msg []byte) ([]byte, error) {
 			return msg, nil
 		}),
-		WithQueueSize(total/4),
+		WithQueueSize(total/3),
 		WithRequestsPerInterval(50, time.Second),
 		WithMetrics(),
 	)