kube-prometheus/thanos: Move to experimental folder

In preparation of PR #1206 [1], This patch moves the Thanos manifests to the
`experimental` folder.

[1] https://github.com/coreos/prometheus-operator/pull/1206

experimental/thanos/query.yaml

@@ -0,0 +1,51 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: thanos-query
+  labels:
+    app: thanos-query
+    thanos-peer: "true"
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: thanos-query
+      thanos-peer: "true"
+  template:
+    metadata:
+      labels:
+        app: thanos-query
+        thanos-peer: "true"
+    spec:
+      containers:
+      - name: thanos-query
+        image: improbable/thanos:latest
+        args:
+        - "query"
+        - "--log.level=debug"
+        - "--query.replica-label=prometheus_replica"
+        - "--cluster.peers=thanos-peers.default.svc:10900"
+        ports:
+        - name: http
+          containerPort: 10902
+        - name: grpc
+          containerPort: 10901
+        - name: cluster
+          containerPort: 10900
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: thanos-query
+  name: thanos-query
+spec:
+  type: NodePort
+  selector:
+    app: thanos-query
+  ports:
+  - port: 9090
+    protocol: TCP
+    targetPort: http
+    name: http-query
+    nodePort: 31111