CloudMigration: Show warning message for successfully migrated non-core data sources (#91545)

* minor performance improvement

* apply a warning to any non-core plugins that successfully migrate

* commit frontend wip while I refactor some stuff

* update api

* repurpose error dialog to be a generic details dialog

* whitespace

* add unit test

* fixes from testing

* fix migration summary

* add comment

* fix localization stuff

* fix backend test

* reduce number of queries to the db

* some PR feedback

* whitespace

pkg/services/cloudmigration/gmsclient/inmemory_client.go

@@ -105,6 +105,12 @@ func (c *memoryClientImpl) GetSnapshotStatus(ctx context.Context, session cloudm
 				RefID:  "folder1",
 				Status: cloudmigration.ItemStatusOK,
 			},
+			{
+				Type:   cloudmigration.DatasourceDataType,
+				RefID:  "ds2",
+				Status: cloudmigration.ItemStatusWarning,
+				Error:  "Only core data sources are supported. Please ensure the plugin is installed on the cloud stack.",
+			},
 		},
 	}