Validate application offline

[nirs]

Given gather application output, validate the gathered application.

Can be done using:

1. Add a flag or command to select this operation (e.g. --offline)
2. The output directory can point to the output directory of the gather application command
3. Read out/gather-application.yaml

application:
  name: appset-deploy-rbd
  namespace: openshift-gitops
config:
  clusterSet: clusterset-submariner-52bbff94cfe4421185
  clusters:
    c1:
      kubeconfig: /Users/nir/envs/ocp/c1
    c2:
      kubeconfig: /Users/nir/envs/ocp/c2
    hub:
      kubeconfig: /Users/nir/envs/ocp/hub
    passive-hub:
      kubeconfig: ""
  distro: ocp
  namespaces:
    argocdNamespace: openshift-gitops
    ramenDRClusterNamespace: openshift-dr-system
    ramenHubNamespace: openshift-operators
    ramenOpsNamespace: openshift-dr-ops
name: gather-application
namespaces:
- e2e-appset-deploy-rbd
- openshift-dr-system
- openshift-gitops
- openshift-operators

4. Create an env

   • issue: we don't have the cluster name in the report

5. Run the validation step using the data directory (gather-application.data)

Depends on #308