Add playbook action to monitor changes to ClusterRoleBindings

[aantn]

Motivation It is useful to track changes to ClusterRoleBindings to stay on top of who has what permissions.

Suggested Feature Robusta already has triggers for ClusterRoleBinding changes (see docs) but there are no builtin actions setup for those triggers. We should add an action called cluster_permissions_watcher which notifies when ClusterRoleBindings change and outputs summarized information about the change.

Alternatives You can monitor ClusterRoleBindings today using the resource_babysitter action (see tutorial and docs) but the output there is very generic and technical. (It just shows a diff.) If we are going to implement an action for this it should be optimized for ClusterRoleBindings and print more useful data like "The ClusterRole named XYZ now has permission to...."

[wahajXgrid]

hey team, I am working on this issue.