Adopting a Standardized ClusterInventory API from SIG Multi-Cluster

[qiujian16]

Describe the enhancement
OCM today uses ManagedCluster to represent a cluster under management. There is an on-going discussion in the sig-multicluster to build a common cluster inventory api https://docs.google.com/document/d/1sUWbe81BTclQ4Uax3flnCoKtEWngH-JA9MyCqljJCBM/edit. It would bring many benefits to OCM to adopt this API since the integration with consumers of cluster inventory API would be much easier.

To adopt it once the sig-multicluster reaches the agreement on the cluster inventory API. We should:

• sync between ManagedCluster and cluster inventory API which ensures backward compatibility.
• placement scheduling should consume cluster inventory API also.
• work with sig-multicluster to enhance the API and investigate if we are able to fully replace ManagedCluster with it in the long term

[qiujian16]

cc @mikeshng

[github-actions]

This issue is stale because it has been open for 120 days with no activity. After 14 days of inactivity, it will be closed. Remove the stable label to prevent this issue from being closed.

[github-actions]

This issue is stale because it has been open for 120 days with no activity. After 14 days of inactivity, it will be closed. Remove the stable label to prevent this issue from being closed.

[github-actions]

This issue is stale because it has been open for 120 days with no activity. After 14 days of inactivity, it will be closed. Remove the stable label to prevent this issue from being closed.