move logger under platform (#20831)

* move logger under platform

api4/graphql.go

@@ -48,7 +48,7 @@ func (api *API) InitGraphQL() error {
 	var err error
 	opts := []graphql.SchemaOpt{
 		graphql.UseFieldResolvers(),
-		graphql.Logger(mlog.NewGraphQLLogger(api.srv.Log)),
+		graphql.Logger(mlog.NewGraphQLLogger(api.srv.Log())),
 		graphql.MaxParallelism(loaderBatchCapacity), // This is dangerous if the query
 		// uses any non-dataloader backed object. So we need to be a bit careful here.
 	}