[feature] Support watch any k8s resource

[Colvin-Y]

User may want to watch their own crd objects, like advanced-statefulset in openkruise. Current object types is too few.\

Actually, if user config kube-watch controller rbac correcly, we can use k8s.io/client-go/dynamic/dynamicinformer to watch any unstructured object if we know it's gvk info (resources can be found by discovery client)\

By this implementation, pkg/controller/controller.go::Start() function will be more short and clear. We can remove so many if conf.Resource.XXX branch.

[aantn]

Hi @Colvin-Y, can you try this branch and let me know how it works for you?

#76

[Colvin-Y]

Hi @Colvin-Y, can you try this branch and let me know how it works for you?

#76
Hi @aantn,
Uhuh，nice PR! implementation is same as what I think. I'd like to try it recently, may this weekend.
Btw, why dont'u refactor controller.go to tidy so many if conf.Resource.XXX case. \

[aantn]

Yes, I think it it possible. It is quite an eyesore right now.

[aantn]

Now supported in the latest version!