drenv: Use "standard" storage class in argocd self test

We use the deployment from ocm-ramen-samples, but it depends on rbd storage which may not be available when argocd test is running.

Line 35 in f696cc3

"--repo=https://github.com/RamenDR/ocm-ramen-samples.git",

We can kustomize the application storage class to "standard" in the same way we modify ApplicationSet in e2e:

Line 390 in f696cc3

appset.Spec.Template.Spec.Source.Kustomize = patches

The kustomization comes from:

Line 55 in f696cc3

func (w Deployment) Kustomize() string {

I could not find a way to add kustomization using the argocd tool.

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