propagate RGI labels to managed resources

[a-hilaly]

Feature Description

Currently labels defined on ResourceGroup Instances are not propagated to their managed sub resources. We need to add support for a label propagation annotation (kro.run/propagate-labels: "true") that will copy all RGI labels to its managed
resources.

Example:

apiVersion: kro.run/v1alpha1
kind: Application
metadata:
  name: my-application
  annotations:
    kro.run/propagate-labels: "true"
  labels:
    environment: production
    team: platform
spec: {...}

[RinkiyaKeDad]

I'll start working on this!