From the user experience and the eks learning, when I log in ocm, I'd like to get the notifications at the top on the cluster list page:

• If there is a new version, there is a notification that how many clusters are upgrade avaliable.
• If there is a cluster with the deprecated version, there is a notification that how many clusters are in the deprecated version.
• If there is cluster is in any long-time configuration, eg. deleting/upgrading/creating, there is a notification that the process is in progress.

Besides, I'd like besides 'Cluster', it shows the total cluster number.