add rhacm 2.12 overlay & rm unsupported releases

rhacm 2.7 and lower are no longer supported

advanced-cluster-management/INFO.md

@@ -4,12 +4,12 @@ Red Hat Advanced Cluster Management for Kubernetes provides the multicluster hub
 
 Red Hat Advanced Cluster Management for Kubernetes also provides the following operators:
 
-- Multicluster subscriptions: An operator that provides application management capabilties including subscribing to resources from a channel and deploying those resources on MCH-managed Kubernetes clusters based on placement rules.
-- Hive for Red Hat OpenShift: An operator that provides APIs for provisioning and performing initial configuration of OpenShift clusters.
-These operators are used by the multicluster hub to provide its provisioning and application-management capabilities.
+- [Multicluster Engine](https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.12/html-single/clusters/index) The multicluster engine operator is the cluster lifecycle operator that provides cluster management capabilities for OpenShift Container Platform and Red Hat Advanced Cluster Management hub clusters.
+
 ## How to Install
+
 Use of this Red Hat product requires a licensing and subscription agreement.
 
 Install the Red Hat Advanced Cluster Management for Kubernetes operator by following instructions presented when you click the `Install` button. After installing the operator, create an instance of the `MultiClusterHub` resource to install the hub. Note that if you will be using the hub to manage non-OpenShift 4.x clusters, you will need to create a Kubernetes `Secret` resource containing your OpenShift pull secret and specify this `Secret` in the `MultiClusterHub` resource, as described in the install documentation.
 
-You can find additional installation guidance in the [install documentation](https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.4/html/install/installing). 
+You can find additional installation guidance in the [install documentation](https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.12/html/install/index).

advanced-cluster-management/README.md

@@ -6,14 +6,11 @@ Do not use the `base` directory directly, as you will need to patch the `channel
 
 The current *overlays* available are for the following channels:
 
-* [release-2.4](operator/overlays/release-2.4)
-* [release-2.5](operator/overlays/release-2.5)
-* [release-2.6](operator/overlays/release-2.6)
-* [release-2.7](operator/overlays/release-2.7)
-* [release-2.8](operator/overlays/release-2.8)
-* [release-2.9](operator/overlays/release-2.9)
-* [release-2.10](operator/overlays/release-2.10)
+* [release-2.12](operator/overlays/release-2.12)
 * [release-2.11](operator/overlays/release-2.11)
+* [release-2.10](operator/overlays/release-2.10)
+* [release-2.9](operator/overlays/release-2.9)
+* [release-2.8](operator/overlays/release-2.8)
 
 ## Usage
 

advanced-cluster-management/operator/overlays/release-2.4/patch-channel.yaml → advanced-cluster-management/operator/overlays/release-2.12/patch-channel.yaml

@@ -1,3 +1,3 @@
 - op: replace
   path: /spec/channel
-  value: release-2.4
+  value: release-2.12