Datasource: Use json-iterator configuration compatible with standard library (#30732)

This will make sure that any map keys in JSON is ordered in /api/ds/query response.

pkg/api/response/response.go

@@ -102,7 +102,12 @@ func (r StreamingResponse) WriteTo(ctx *models.ReqContext) {
 		header[k] = v
 	}
 	ctx.Resp.WriteHeader(r.status)
-	enc := jsoniter.NewEncoder(ctx.Resp)
+
+	// Use a configuration that's compatible with the standard library
+	// to minimize the risk of introducing bugs. This will make sure
+	// that map keys is ordered.
+	jsonCfg := jsoniter.ConfigCompatibleWithStandardLibrary
+	enc := jsonCfg.NewEncoder(ctx.Resp)
 	if err := enc.Encode(r.body); err != nil {
 		ctx.Logger.Error("Error writing to response", "err", err)
 	}

pkg/tsdb/models.go

@@ -264,5 +264,9 @@ func (df *dataFrames) MarshalJSON() ([]byte, error) {
 		return nil, err
 	}
 
-	return jsoniter.Marshal(encoded)
+	// Use a configuration that's compatible with the standard library
+	// to minimize the risk of introducing bugs. This will make sure
+	// that map keys is ordered.
+	jsonCfg := jsoniter.ConfigCompatibleWithStandardLibrary
+	return jsonCfg.Marshal(encoded)
 }