Bump kube rbac proxy to v0.6.0

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Bump to kubernetes 1.19.0

Argocd examples

Removed EKS patch from example

node-exporter: set maxUnavailable to 10%

This daemonset doesn't affect workload availability so allow its rollout to
be parallelized.

Support utf8 in external file alertmanager config

This could have been achieved either by switching to stringData, or doing
`std.base64(std.encodeUTF8($._config.alertmanager.config))` as per
google/jsonnet#575

I went with the former, because it's:
1. Easier to read existing config
2. Consistent with the way jsonnet object-based config is written just above

Grammatical correction in README

Pin back to master and bump prometheus-operator to 0.41.1

Thanos Sidecar Exposure and Scraping via ServiceMonitor

Expose the Thanos Sidecar's HTTP metrics and gRPC StoreAPI interfaces via a dedicated service. ClusterIP is set to none to allow for full discovery of all endpoints behind the service via in-cluster DNS. This allows for a new ServiceMonitor to then scrape the metrics available on the Sidecar's HTTP port.

A new service has been used so as to separate out the metrics that Prometheus makes available, and the metrics the Thanos Sidecar makes available. The Thanos Mixins from thanos-io/thanos default to a job label of 'thanos-sidecar', and hence the service here has had this label applied.

jsonnet/prometheus-operator.libsonnet: Adjust alerts range

pin release0.6 release

Add scraping of endpoint for kubelet probe metrics