* [Modified] Makefile to run kustomize.jsonnet
* [Modified] Moved kustomization from example.jsonnet to
examples/kustomize.jsonnet
* [Modified] kustomization file to land at root of kube-prometheus so
current users can continue to use `kubectl apply -f manifests`

Closes #2391

Adds support to allow kustomize users to point to a [remote
base](https://github.com/kubernetes-sigs/kustomize/blob/master/examples/remoteBuild.md) of the prometheus-operator and kube-prometheus. Now that kustomize is a part of kubectl, this is provides a very simple way of installing prometheus-operator and kube-prometheus with no additional tools besides kubectl.

* [Added] kustomization.yaml: hardcoded kustomization base for prometheus-operator
bundle.yaml
* [Added] kustomization generation from kube-prometheus example jsonnet

contrib/kube-prometheus: Update Prometheus, Thanos & Grafana

Use recommended addon-resizer 1.8.4

Update developing-prometheus-rules-and-grafana-dashboards.md

From the discussion brought up in this [issue](https://github.com/coreos/prometheus-operator/issues/2250), a new section has been added to the doc.

contrib/kube-prometheus: fix GKE cAdvisor readme link

* `tsdb_wal_corruptions_total metric` name should be
`prometheus_tsdb_wal_corruptions_total`

kube-prometheus/docs: Update how to handle existing rules

Changed kubectl apply -f to kubectl create -f. kubectl apply command leads to conflicts and race conditions. kubectl create works the first time you run it

Allow browsing of downsampled thanos data in Grafana

Upgrade prometheus-adapter APIService to v1

Signed-off-by: Michael Goodness <mike.goodness@ticketmaster.com>

Also remove unnecessary namespace from prometheus-adapter ClusterRoleBinding

Signed-off-by: Michael Goodness <mike.goodness@ticketmaster.com>

Reduce metrics