[hub75] Add set_brightness action (#12521)

tests/components/hub75/common.yaml

@@ -0,0 +1,12 @@
+esphome:
+  on_boot:
+    # Test simple value
+    - hub75.set_brightness: 200
+
+    # Test templatable value
+    - hub75.set_brightness: !lambda 'return 100;'
+
+    # Test with explicit ID
+    - hub75.set_brightness:
+        id: my_hub75
+        brightness: 50

tests/components/hub75/test.esp32-idf.yaml

@@ -1,8 +1,3 @@
-esp32:
-  board: esp32dev
-  framework:
-    type: esp-idf
-
 display:
   - platform: hub75
     id: my_hub75
@@ -37,3 +32,5 @@ display:
       then:
         lambda: |-
           ESP_LOGD("display", "1 -> 2");
+
+<<: !include common.yaml

tests/components/hub75/test.esp32-s3-idf-board.yaml

@@ -1,8 +1,3 @@
-esp32:
-  board: esp32-s3-devkitc-1
-  framework:
-    type: esp-idf
-
 display:
   - platform: hub75
     id: hub75_display_board
@@ -24,3 +19,5 @@ display:
       then:
         lambda: |-
           ESP_LOGD("display", "1 -> 2");
+
+<<: !include common.yaml

tests/components/hub75/test.esp32-s3-idf.yaml

@@ -1,8 +1,3 @@
-esp32:
-  board: esp32-s3-devkitc-1
-  framework:
-    type: esp-idf
-
 display:
   - platform: hub75
     id: my_hub75
@@ -37,3 +32,5 @@ display:
       then:
         lambda: |-
           ESP_LOGD("display", "1 -> 2");
+
+<<: !include common.yaml