use single command to uninstall mesh and cluster wide resources (open…

…servicemesh#4491)

This commit combines the osm uninstall mesh and osm uninstall
cluster-wide-resources to a single command. The user can specify
delteion of cluster wide resources by using the flag
--delete-cluster-wide-resoures.

If there is no mesh in the cluster, the user can still use the same
command to delete the cluster wide resources by providing the flag.

 This command has been made idempotent as
well.

fixes openservicemesh#4429

Signed-off-by: Sneha Chhabria <snchh@microsoft.com>

cmd/cli/uninstall.go

@@ -20,13 +20,7 @@ func newUninstallCmd(config *action.Configuration, in io.Reader, out io.Writer)
 		Long:    uninstallDescription,
 		Args:    cobra.NoArgs,
 	}
-
-	if !settings.IsManaged() {
-		cmd.AddCommand(newUninstallMeshCmd(config, in, out))
-	}
-
-	// The command to uninstall osm cluster-wide resources should be available in both managed and unmanaged environments.
-	cmd.AddCommand(newUninstallClusterWideResourcesCmd(in, out))
+	cmd.AddCommand(newUninstallMeshCmd(config, in, out))
 
 	return cmd
 }