[CI] Consolidate some tests (N, O, P) (#8204)

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

@@ -1,28 +1,5 @@
-esphome:
-  on_boot:
-    then:
-      - pzemac.reset_energy: pzemac1
+substitutions:
+  tx_pin: GPIO4
+  rx_pin: GPIO5
 
-uart:
-  - id: uart_pzemac
-    tx_pin: 4
-    rx_pin: 5
-    baud_rate: 9600
-
-modbus:
-
-sensor:
-  - platform: pzemac
-    id: pzemac1
-    voltage:
-      name: PZEMAC Voltage
-    current:
-      name: PZEMAC Current
-    power:
-      name: PZEMAC Power
-    energy:
-      name: PZEMAC Energy
-    frequency:
-      name: PZEMAC Frequency
-    power_factor:
-      name: PZEMAC Power Factor
+<<: !include common.yaml