examples: update platform snippets and doc

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

examples/eks-cni-example.jsonnet

@@ -1,9 +1,11 @@
-local kp = (import 'kube-prometheus/main.libsonnet') +
-           (import 'kube-prometheus/platforms/eks.libsonnet') + {
+local kp = (import 'kube-prometheus/main.libsonnet') + {
   values+:: {
     common+: {
       namespace: 'monitoring',
     },
+    kubePrometheus+: {
+      platform: 'eks',
+    },
   },
   kubernetesControlPlane+: {
     prometheusRuleEksCNI+: {

examples/jsonnet-snippets/aws.jsonnet

@@ -1,2 +0,0 @@
-(import 'kube-prometheus/main.libsonnet') +
-(import 'kube-prometheus/platforms/aws.libsonnet')

examples/jsonnet-snippets/bootkube.jsonnet

@@ -1,2 +0,0 @@
-(import 'kube-prometheus/main.libsonnet') +
-(import 'kube-prometheus/platforms/bootkube.libsonnet')

examples/jsonnet-snippets/kops-coredns.jsonnet

@@ -1,3 +0,0 @@
-(import 'kube-prometheus/main.libsonnet') +
-(import 'kube-prometheus/platforms/kops.libsonnet') +
-(import 'kube-prometheus/platforms/kops-coredns.libsonnet')

examples/jsonnet-snippets/kops.jsonnet

@@ -1,2 +0,0 @@
-(import 'kube-prometheus/main.libsonnet') +
-(import 'kube-prometheus/platforms/kops.libsonnet')

examples/jsonnet-snippets/kubeadm.jsonnet

@@ -1,2 +0,0 @@
-(import 'kube-prometheus/main.libsonnet') +
-(import 'kube-prometheus/platforms/kubeadm.libsonnet')

examples/jsonnet-snippets/kubespray.jsonnet

@@ -1,2 +0,0 @@
-(import 'kube-prometheus/main.libsonnet') +
-(import 'kube-prometheus/platforms/kubespray.libsonnet')

examples/jsonnet-snippets/platform.jsonnet

@@ -0,0 +1,8 @@
+(import 'kube-prometheus/main.libsonnet') +
+{
+  values+:: {
+    kubePrometheus+: {
+      platform: 'example-platform',
+    },
+  },
+}

examples/minikube.jsonnet

@@ -1,6 +1,5 @@
 local kp =
   (import 'kube-prometheus/main.libsonnet') +
-  (import 'kube-prometheus/platforms/kubeadm.libsonnet') +
   // Note that NodePort type services is likely not a good idea for your production use case, it is only used for demonstration purposes here.
   (import 'kube-prometheus/addons/node-ports.libsonnet') +
   {
@@ -19,6 +18,9 @@ local kp =
           },
         },
       },
+      kubePrometheus+: {
+        platform: 'kubeadm',
+      },
     },
 
     // For simplicity, each of the following values for 'externalUrl':