[adc] Fix PICO_VSYS_PIN compile error on RP2350 boards (#14724)

tests/components/adc/test.rp2040-pico2-ard.yaml

@@ -0,0 +1,11 @@
+sensor:
+  - id: my_sensor
+    platform: adc
+    pin: VCC
+    name: ADC Test sensor
+    update_interval: "1:01"
+    unit_of_measurement: "°C"
+    icon: "mdi:water-percent"
+    accuracy_decimals: 5
+    setup_priority: -100
+    force_update: true

tests/components/spi/test.rp2040-pico2-ard.yaml

@@ -0,0 +1,6 @@
+substitutions:
+  clk_pin: GPIO2
+  mosi_pin: GPIO3
+  miso_pin: GPIO4
+
+<<: !include common.yaml

tests/test_build_components/build_components_base.rp2040-pico2-ard.yaml

@@ -0,0 +1,15 @@
+esphome:
+  name: componenttestrp2040pico2ard
+  friendly_name: $component_name
+
+rp2040:
+  board: rpipico2
+
+logger:
+  level: VERY_VERBOSE
+
+packages:
+  component_under_test: !include
+    file: $component_test_file
+    vars:
+      component_test_file: $component_test_file

tests/test_build_components/common/spi/rp2040-pico2-ard.yaml

@@ -0,0 +1,12 @@
+# Common SPI configuration for RP2040 Pico 2 (RP2350) Arduino tests
+
+substitutions:
+  clk_pin: GPIO18
+  mosi_pin: GPIO19
+  miso_pin: GPIO16
+
+spi:
+  - id: spi_bus
+    clk_pin: ${clk_pin}
+    mosi_pin: ${mosi_pin}
+    miso_pin: ${miso_pin}