Cleanup getDi and registering injectables (#7251)

* Cleanup getDi and registering injectables

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

* Create more explicit application

- Make testing use more production code

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

* Fix uses of getEnvironmentSpecificLegacyGlobalDiForExtensionApi

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

* Fix unit tests

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

---------

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

packages/core/src/common/vars/node-env.injectable.testing-env.ts

@@ -0,0 +1,14 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import { getInjectable } from "@ogre-tools/injectable";
+import nodeEnvInjectionToken from "./node-env-injection-token";
+
+const nodeEnvFakeInjectable = getInjectable({
+  id: "node-env-fake",
+  instantiate: () => "production",
+  injectionToken: nodeEnvInjectionToken,
+});
+
+export default nodeEnvFakeInjectable;