Replace Resource.options with annotations

[monopole]

The field Resource.options is used to remember how a generated ConfigMap or Secret should behave as it propagates up a kustomization stack (merge with or replace maps or secrets with the same name).

This information isn't available to an out-of-process transformer, but like all other RNode metadata (e.g. the history of previous resource names in the transformation pipeline) it should be.

https://github.com/kubernetes-sigs/kustomize/blob/master/api/resource/resource.go#L25

[k8s-ci-robot]

@monopole: This issue is currently awaiting triage.

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