lightning delete cluster CLI command help text update (#15760)

* updated the lighting delete cluster CLI command help text output
* updated changelog
* typo fix
* Apply suggestions from code review

Co-authored-by: Jirka Borovec <[email protected]>

Author: rlizzo

src/lightning_app/cli/lightning_cli_delete.py

@@ -33,17 +33,19 @@ def delete() -> None:
     help="Enabling this flag makes the CLI wait until the cluster is deleted.",
 )
 def delete_cluster(cluster: str, force: bool = False, wait: bool = False) -> None:
-    """Delete a Lightning AI BYOC compute cluster and all associated cloud provider resources.
+    """Delete a Lightning AI BYOC cluster and all associated cloud provider resources.
 
-    Deleting a run also deletes all Runs and Experiments that were started on the cluster.
-    Deletion permanently removes not only the record of all runs on a cluster, but all associated experiments,
-    artifacts, metrics, logs, etc.
+    Deleting a cluster also deletes all apps that were started on the cluster.
+    Deletion permanently removes not only the record of all apps run on a cluster,
+    but all associated data, artifacts, metrics, logs, web-UIs, etc.
 
-    WARNING: This process may take a few minutes to complete, but once started it CANNOT be rolled back.
-    Deletion permanently removes not only the BYOC cluster from being managed by Lightning AI, but tears down
-    every BYOC resource Lightning AI managed (for that cluster id) in the host cloud.
+    WARNING: This process may take a few minutes to complete, but once started it
+    CANNOT be rolled back. Deletion tears down every cloud provider resource
+    managed by Lightning AI and permanently revokes the ability for Lightning AI
+    to create, manage, or access any resources within the host cloud account.
 
-    All object stores, container registries, logs, compute nodes, volumes, etc. are deleted and cannot be recovered.
+    All object stores, container registries, logs, compute nodes, volumes,
+    VPC components, etc. are irreversibly deleted and cannot be recovered!
     """
     cluster_manager = AWSClusterManager()
     cluster_manager.delete(cluster_id=cluster, force=force, wait=wait)