[adc] Test platforms on IDF (#9536)

tests/components/adc/test.esp32-ard.yaml

@@ -1,11 +1,6 @@
+packages:
+  base: !include common.yaml
+
 sensor:
-  - platform: adc
+  - id: !extend my_sensor
     pin: A0
-    name: Living Room Brightness
-    update_interval: "1:01"
-    attenuation: 2.5db
-    unit_of_measurement: "°C"
-    icon: "mdi:water-percent"
-    accuracy_decimals: 5
-    setup_priority: -100
-    force_update: true