server: give heartbeat-options test a topology (#11853)

heartbeatResponse now reads MaxVolumeId and TopologyId off ms.Topo, but
the test built a MasterServer without one and panicked, failing the
package for every PR.

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Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

weed/server/master_grpc_server_digest_test.go

@@ -132,7 +132,11 @@ func TestDigestCheckAsksForTheListWhenTheLookupIndexDrifts(t *testing.T) {
 // preallocate is a bare bool with no way to tell "off" from "not mentioned". A
 // response that left it out would turn preallocation off until reconnect.
 func TestHeartbeatResponsesCarryTheVolumeOptions(t *testing.T) {
-	ms := &MasterServer{option: &MasterOption{VolumeSizeLimitMB: 1024}, preallocateSize: 1}
+	ms := &MasterServer{
+		option:          &MasterOption{VolumeSizeLimitMB: 1024},
+		preallocateSize: 1,
+		Topo:            topology.NewTopology("test", sequence.NewMemorySequencer(), 32*1024, 5, false),
+	}
 
 	resend := ms.heartbeatResponse()
 	resend.ResendFullVolumeList = true