checks bare-pods: skip static pods

[valbeat]

75

When checking for bare pods, I want to exclude static pods created by kubelet. https://kubernetes.io/docs/tasks/configure-pod-container/static-pod/

Also, if you are using Managed k8s, I may not be able to add annotaion to pod.

To solve this problem, we have added a process to skip static-pods when checking for bare-pods.

Please let me know if there is another good way.

[timoreimann]

If static pods don't provide a better way to be identified (which seemingly isn't the case), then I'm okay with this as well.

[valbeat]

Thank you!