NWT 7speed fan: naming

- top level name should be generic, as other fans are likely to match (same as arlec and sulion 3-speed versions)
- product name does not need generic portions

custom_components/tuya_local/devices/nwt_7speed_fan.yaml

@@ -1,7 +1,7 @@
-name: NEW WIDETECH 7 speed AC fan
+name: Pedestal 7 speed fan
 products:
   - id: qdxgvuj2ncbx5aha
-    name: NEW WIDETECH 7 speed AC fan WPF-16SW5
+    name: NEW WIDETECH WPF-16SW5
 primary_entity:
   entity: fan
   dps: