[CI] Consolidate some tests (S) (#8206)

tests/components/sdm_meter/test.esp8266-ard.yaml

@@ -1,23 +1,5 @@
-uart:
-  - id: uart_sdm_meter
-    tx_pin: 4
-    rx_pin: 5
-    baud_rate: 9600
+substitutions:
+  tx_pin: GPIO4
+  rx_pin: GPIO5
 
-sensor:
-  - platform: sdm_meter
-    phase_a:
-      current:
-        name: Phase A Current
-      voltage:
-        name: Phase A Voltage
-      active_power:
-        name: Phase A Power
-      power_factor:
-        name: Phase A Power Factor
-      apparent_power:
-        name: Phase A Apparent Power
-      reactive_power:
-        name: Phase A Reactive Power
-      phase_angle:
-        name: Phase A Phase Angle
+<<: !include common.yaml