fix(image): resolve migration conflict and refactor API connection test

- Renumber image migration from 0076 to 0081 to avoid conflict with openstack
- Add registry parameter to ImageProvider.test_connection() for registry-level testing
- Refactor API connection test to delegate to test_connection() like other providers
- Add tests for registry path in test_connection()

api/src/backend/api/migrations/0081_image_provider.py

@@ -7,7 +7,7 @@ import api.db_utils
 
 class Migration(migrations.Migration):
     dependencies = [
-        ("api", "0075_cloudflare_provider"),
+        ("api", "0080_backfill_attack_paths_graph_data_ready"),
     ]
 
     operations = [
@@ -27,6 +27,7 @@ class Migration(migrations.Migration):
                     ("oraclecloud", "Oracle Cloud Infrastructure"),
                     ("alibabacloud", "Alibaba Cloud"),
                     ("cloudflare", "Cloudflare"),
+                    ("openstack", "OpenStack"),
                     ("image", "Image"),
                 ],
                 default="aws",

api/src/backend/api/utils.py

@@ -324,19 +324,14 @@ def prowler_provider_connection_test(provider: Provider) -> Connection:
         }
         return prowler_provider.test_connection(**openstack_kwargs)
     elif provider.provider == Provider.ProviderChoices.IMAGE.value:
-        from prowler.providers.image.lib.registry.factory import create_registry_adapter
-
-        try:
-            adapter = create_registry_adapter(
-                registry_url=provider.uid,
-                username=prowler_provider_kwargs.get("registry_username"),
-                password=prowler_provider_kwargs.get("registry_password"),
-                token=prowler_provider_kwargs.get("registry_token"),
-            )
-            adapter.list_repositories()
-            return Connection(is_connected=True, error=None)
-        except Exception as e:
-            return Connection(is_connected=False, error=str(e))
+        image_kwargs = {
+            "registry": provider.uid,
+            "raise_on_exception": False,
+        }
+        for key in ("registry_username", "registry_password", "registry_token"):
+            if key in prowler_provider_kwargs:
+                image_kwargs[key] = prowler_provider_kwargs[key]
+        return prowler_provider.test_connection(**image_kwargs)
     else:
         return prowler_provider.test_connection(
             **prowler_provider_kwargs,