update README, change minikube k8s-version to 1.14.4

Include node name in NodeDiskRunningFull alert

This makes it easier to indetify which node alert is firing for.
Currently only device namespace and pod name were included in
the alert.

This allows us to display the node name in alerts, instead of the IP.

change to use GA kubelet OS label

Add empty podMonitorSelector to Prometheus resource

Use upstream Prometheus monitoring mixin

Remove Thanos components except sidecar

manifests: Re-generate

Update kube-state-metrics.libsonnet

Bump to newer release for Prometheus and Alertmanager

With the bump to kube-state-metrics v1.6 they added ingress and certificates but this updates the rbac rules so that those work with the new version.

Add thanos v0.5.0 support & remove deprecated thanos gossip

Signed-off-by: Benjamin <benjamin@yunify.com>

Bump kube-state-metrics version to 1.6.0

Use kubernetes-mixin's master in kube-prometheus master

Bump prometheus operator to v0.31.0