[esp32_touch] Migrate to new unified touch sensor driver (esp_driver_touch_sens) (#14033)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: J. Nick Koston <nick@home-assistant.io>

tests/components/esp32_touch/common-variants.yaml

@@ -4,7 +4,6 @@ esp32_touch:
   measurement_duration: 8ms
   low_voltage_reference: 0.5V
   high_voltage_reference: 2.7V
-  voltage_attenuation: 1.5V
 
 binary_sensor:
   - platform: esp32_touch

tests/components/esp32_touch/test.esp32-p4-idf.yaml

@@ -0,0 +1,5 @@
+substitutions:
+  pin: GPIO5
+
+<<: !include common-variants.yaml
+<<: !include common-get-value.yaml