This patch adds sample NodeFeatureRules that correspond the built-in
labels created by nfd-worker (with its default configuration).
The samples provide examples on how to utilize NodeFeatureRules and an
easy way to modify the labels being generated. In order to replace the
built-in node labeling of nfd-worker with these sample rules, all node
labeling from nfd-worker must be disabled by setting the
"core.labelSources" configuration option to an empty list (or specify
"-label-sources= " on the command line). Then, with all nfd-worker side
labeling disabled, just apply the rules with
kubectl apply -f samples/
