Add useful case test-utils helper

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/test-utils/cast.ts

@@ -0,0 +1,6 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+export const cast = <T>(data: Partial<T>): T => data as T;