What

Remove workarround APP_NAMESPACES

Why?

It was just added until we are able to use the feature which now is implemented and merged in the framework which allows us to pass a List of Namespaces instead of just 1 or ALL to watch in the main.go.

How

• Remove all namespace validations from the controller and its own tests
• The APP_NAMESPACE values will be used in the main.go instead of as the following example.

// Create a new Cmd to provide shared dependencies and start components
	mgr, err := manager.New(cfg, manager.Options{
		NewCache: cache.MultiNamespacedCacheBuilder(namespaces), //HERE YOU WILL PASS THE LIST OF NAMESPACES ADDED IN THE ENV VAR
	})