Integrate kibana with google auth

Allows for additional SSO provider values to be passed along to es/kb. Adds an example for integrating with google auth in place of keycloak.

Closes #361 (closed).

chart/templates/logging/elasticsearch-kibana/ek-helmrelease.yaml

@@ -9,6 +9,8 @@ metadata:
     app.kubernetes.io/name: logging
     app.kubernetes.io/component: "core"
     {{- include "commonLabels" . | nindent 4}}
+  annotations:
+    checksum/values: {{ include (print $.Template.BasePath "/logging/elasticsearch-kibana/values.yaml") . | sha256sum }}
 spec:
   targetNamespace: logging
   chart: