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

Update grafana

custom metrics API quick fix

Rename DeadMansSwitch to Watchdog

FIx typo in README.md