Add Cat Elite Sync pet feeder as a variant of advwin_6l_petfeeder (#5680)

The Cat Elite Sync (product id lcvb9ivikrml5f1v) shares the same dp
set as the existing Advwin/Papifeed 6L camera pet feeder config, so
it is added as a product entry rather than a separate config file.

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

custom_components/tuya_local/devices/advwin_6l_petfeeder.yaml

@@ -6,6 +6,9 @@ products:
   - id: vd6bt2zlpmjmm02o
     manufacturer: Papifeed
     model: 7L camera 202301
+  - id: lcvb9ivikrml5f1v
+    manufacturer: Cat Elite
+    model: Sync
 entities:
   - entity: switch
     translation_key: motion_detection