Support the Kubernetes rudr implementation

[binarylogic]

Rudr has come up in discussions and I'd like to think about supporting it for Vector. Before we begin I want to gauge demand and make sure this is worth doing.

[binarylogic]

@MOZGIII assigning this to you just to review. I'm unsure if we need to do this or if this is within the scope of v1, but it might be relevant for #2222.

[MOZGIII]

• Should we use it or rely on OAM when deploying Vector?
  No, we're a service-level component, we want to abstract from the deployment models.

• Should Vector work for people developing their apps with OAM?
  Yes, and it'll come naturally since we're focusing on interfacing with Pods, and not higher-level abstractions. Rudr creates Pod under the hood just like everything else - it's just another high-level abstraction.

I don't think we'll have to do anything specific to support Rudr, so I'm closing this for now.