WIP add back span status

Author: sl0thentr0py

sentry_sdk/tracing.py

@@ -729,7 +729,7 @@ def to_json(self):
         }  # type: Dict[str, Any]
 
         if self.status:
-            self._tags["status"] = self.status
+            rv["status"] = self.status
 
         if len(self._measurements) > 0:
             rv["measurements"] = self._measurements