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

tests/components/pcd8544/common.yaml

@@ -0,0 +1,14 @@
+spi:
+  - id: spi_pcd8544
+    clk_pin: ${clk_pin}
+    mosi_pin: ${mosi_pin}
+    miso_pin: ${miso_pin}
+
+display:
+  - platform: pcd8544
+    cs_pin: ${cs_pin}
+    dc_pin: ${dc_pin}
+    reset_pin: ${reset_pin}
+    contrast: 60
+    lambda: |-
+      it.rectangle(0, 0, it.get_width(), it.get_height());