fix(klarstein_iceblock_airconditioner): make timer optional

Compatibility improvement for Issue #5426

custom_components/tuya_local/devices/klarstein_iceblock_airconditioner.yaml

@@ -105,6 +105,7 @@ entities:
     dps:
       - id: 105
         type: integer
+        optional: true
         name: value
         unit: h
         range: