Kustomize: Support for wildcard in resource

[lionelvillard]

Currently each resource needs to be enumerated in kustomization.yaml so when a new yaml file is added, kustomization.yaml needs to be updated. It'd be great if resource accepts wildcard or directory

[Liujingfang1]

@lionelvillard We did consider this support previously, but decided not to add it. The reason is documented here https://github.com/kubernetes-sigs/kustomize/blob/master/docs/eschewedFeatures.md#globs-in-kustomization-files

On the other side, our kustomize edit add resource support globs. You can use it to add files under a directory to kustomization.yaml.