[WIP] Add CRD and controller logic

[alexkursell]

This adds the crd definition, generated client libraries, and the crd subscription logic.

Right now it isn't working. It will read all of the crd definitions in the cluster at controller startup, but it fails to watch for any changes after that. I haven't figured this out yet.

Once I've gotten that working, I have to add hooking into @wayt's download code and sending updates through the unix socket to lua. I also still have to add the vars field to the CRD

[aledbf]

I don't see the point of a CRD for this definition. If we are just going to store base64 definition of the plugin, then using a configmap is a more proper solution than a custom CRD

[aledbf]

@alexkursell if you use kubebuilder to add a custom type, the boilerplate you need to write is less than half this PR.

[aledbf]

@alexkursell not sure if you are aware of the limits but an object cannot be more than 1MB in Kubernetes (not sure what kind of plugin could require this)