Spiffe support #1186
Description
What would you like to be added:
Support SPIFFE for verifying nfd-worker/labeler IDs. For example, utilize spiffe IDs for verifying the identity of creator of NodeFeature objects, so that an actor from node A will not be able to modify properties of node B. This would also add one extra layer of protection (in addition to RBAC) on who is authorized to modify nodes with NodeFeature objects.
To simplify, gRPC could be possibly left out-of-scope, if needed, as it's being phased out.
Inspired by comment from @AhmedGrati on the node-feature-discovery slack channel.
Why is this needed:
Improved security