Analyzer's k8s probe doesn't support Kubernetes >= 1.16

[LoicLeGal]

Summary

Detected on tag v0.26.0
As mentioned in skydive-project/skydive-helm#2 Kubernetes >= 1.16 is not supported for Skydive templates. Furthermore, the Analyzer K8s probe uses deprecated REST path specifically the daemonset v1beta1

skydive/topology/probes/k8s/statefulset.go

Line 26 in 427085d

"k8s.io/api/apps/v1beta1"

This leads to these traces in the Analyzer:
k8s/probe.go:198 logOnError skydive-skydive-analyzer ... Failed to list *v1beta1.NetworkPolicy: the server could not find the requested resource

Expected change

As stated in January 30, 2020 minutes: Skydive should support multiple versions of the API
that is both pre and post k8s 1.16 interface versions