fix(resource): change how buffer workers are started

apps/emqx_resource/src/emqx_resource_manager.erl

@@ -147,9 +147,9 @@ create(ResId, Group, ResourceType, Config, Opts) ->
     QueryMode = emqx_resource:query_mode(ResourceType, Config, Opts),
     case QueryMode of
         %% the resource has built-in buffer, so there is no need for resource workers
-        simple_sync ->
+        simple_sync_internal_buffer ->
             ok;
-        simple_async ->
+        simple_async_internal_buffer ->
             ok;
         %% The resource is a consumer resource, so there is no need for resource workers
         no_queries ->