MM-24544: Fix crash in (*Status).ToClusterJson (#14484)

We apply the same fix that was done in https://github.com/mattermost/mattermost-server/pull/14147.
This method was missed out.

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

model/status.go

@@ -35,7 +35,8 @@ func (o *Status) ToJson() string {
 }
 
 func (o *Status) ToClusterJson() string {
-	b, _ := json.Marshal(o)
+	oCopy := *o
+	b, _ := json.Marshal(oCopy)
 	return string(b)
 }