Separate OTABackend from OTA component (#6459)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

tests/components/ota/common.yaml

@@ -3,28 +3,29 @@ wifi:
   password: password1
 
 ota:
-  safe_mode: true
-  password: "superlongpasswordthatnoonewillknow"
-  port: 3286
-  reboot_timeout: 2min
-  num_attempts: 5
-  on_begin:
-    then:
-      - logger.log: "OTA start"
-  on_progress:
-    then:
-      - logger.log:
-          format: "OTA progress %0.1f%%"
-          args: ["x"]
-  on_end:
-    then:
-      - logger.log: "OTA end"
-  on_error:
-    then:
-      - logger.log:
-          format: "OTA update error %d"
-          args: ["x"]
-  on_state_change:
-    then:
-      lambda: >-
-        ESP_LOGD("ota", "State %d", state);
+  - platform: esphome
+    safe_mode: true
+    password: "superlongpasswordthatnoonewillknow"
+    port: 3286
+    reboot_timeout: 2min
+    num_attempts: 5
+    on_begin:
+      then:
+        - logger.log: "OTA start"
+    on_progress:
+      then:
+        - logger.log:
+            format: "OTA progress %0.1f%%"
+            args: ["x"]
+    on_end:
+      then:
+        - logger.log: "OTA end"
+    on_error:
+      then:
+        - logger.log:
+            format: "OTA update error %d"
+            args: ["x"]
+    on_state_change:
+      then:
+        lambda: >-
+          ESP_LOGD("ota", "State %d", state);

tests/components/safe_mode/common.yaml

@@ -3,6 +3,8 @@ wifi:
   password: password1
 
 ota:
+  - platform: esphome
+    safe_mode: true
 
 button:
   - platform: safe_mode