Fix reflect.DeepEqual both receiving pointers (#5854)

In `processClusterCreateStream` there was a call to `reflect.DeepEqual`
with different types making it always fail. `mset.config()` is the
config itself, whereas `sa.Config` is a pointer to the config. So we
need to pass `mset.config()` as a pointer instead.

In `processClusterCreateConsumer` this was done as well:
```go
cfg := o.config()
if isConfigUpdate = !reflect.DeepEqual(&cfg, ca.Config); isConfigUpdate {
```

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Signed-off-by: Maurice van Veen <[email protected]>

server/jetstream_cluster.go

@@ -3799,7 +3799,8 @@ func (js *jetStream) processClusterCreateStream(acc *Account, sa *streamAssignme
 			}
 			mset.setStreamAssignment(sa)
 			// Check if our config has really been updated.
-			if !reflect.DeepEqual(mset.config(), sa.Config) {
+			cfg := mset.config()
+			if !reflect.DeepEqual(&cfg, sa.Config) {
 				if err = mset.updateWithAdvisory(sa.Config, false, false); err != nil {
 					s.Warnf("JetStream cluster error updating stream %q for account %q: %v", sa.Config.Name, acc.Name, err)
 					if osa != nil {