test: Simplify mock responses in service health check tests

### Summary of Changes
- Consolidated mock response definitions in the `test_get_services` method for improved readability.
- Enhanced maintainability of the test suite by streamlining the structure of service status mock data.

### Expected Results
- Improved clarity in test definitions, making it easier to understand the expected service responses.
- Facilitated future updates to the test suite by reducing complexity in mock data setup.

services/service-adapters/tests/test_general_routes.py

@@ -50,27 +50,9 @@ class TestGeneralRoutes:
 
         # Mock the health check results
         mock_check_services.return_value = {
-            "home_assistant": {
+            "home_assistant": {"status": "unknown", "response_time": None, "error": None, "uptime": None, "metadata": {}},
-                "status": "unknown",
+            "frigate": {"status": "unknown", "response_time": None, "error": None, "uptime": None, "metadata": {}},
-                "response_time": None,
+            "immich": {"status": "disabled", "response_time": None, "error": None, "uptime": None, "metadata": {}},
-                "error": None,
-                "uptime": None,
-                "metadata": {}
-            },
-            "frigate": {
-                "status": "unknown",
-                "response_time": None,
-                "error": None,
-                "uptime": None,
-                "metadata": {}
-            },
-            "immich": {
-                "status": "disabled",
-                "response_time": None,
-                "error": None,
-                "uptime": None,
-                "metadata": {}
-            }
         }
 
         response = client.get("/services")