Consolidate test files where all tests are identical (#6690)

tests/components/rpi_dpi_rgb/common.yaml

@@ -0,0 +1,40 @@
+psram:
+  mode: octal
+  speed: 80MHz
+display:
+  - platform: rpi_dpi_rgb
+    update_interval: never
+    auto_clear_enabled: false
+    id: rpi_display
+    color_order: RGB
+    rotation: 90
+    dimensions:
+      width: 800
+      height: 480
+    de_pin:
+      number: 40
+    hsync_pin: 39
+    vsync_pin: 41
+    pclk_pin: 42
+    data_pins:
+      red:
+        - number: 45  # r1
+          ignore_strapping_warning: true
+        - 48        # r2
+        - 47        # r3
+        - 21        # r4
+        - number: 14  # r5
+          ignore_strapping_warning: false
+      green:
+        - 5         # g0
+        - 6         # g1
+        - 7         # g2
+        - 15        # g3
+        - 16        # g4
+        - 4         # g5
+      blue:
+        - 8         # b1
+        - 3         # b2
+        - 46        # b3
+        - 9         # b4
+        - 1         # b5