fix(disk): sets default retries=20 for polling disk status

This commit addresses the 'Disk cannot be deleted as it is bound to a deployment' error.
It increases the default retries for polling disk status to change to available, introducing
a total of 20 retries with 5-second intervals. This modification aims ensure a more thorough
check before attempting disk deletion.

riocli/disk/model.py

@@ -79,7 +79,7 @@ def delete_object(self, client: Client, obj: typing.Any) -> typing.Any:
         volume_instance = client.get_volume_instance(obj.internalDeploymentGUID)
         volume_instance.destroy_volume_instance()
 
-    def _poll_till_available(self, client: Client, obj: typing.Any, sleep_interval=5, retries=10):
+    def _poll_till_available(self, client: Client, obj: typing.Any, sleep_interval=5, retries=20):
         dep_guid = obj.internalDeploymentGUID
         deployment = client.get_deployment(deployment_id=dep_guid)