single-use nodes takes too long to be deleted

### Describe your use-case which is not covered by existing documentation.

I have an slave configured with a retention time of 0, the _Help for feature_ says that the node will be deleted after the first execution of a task:
> If set to 0, the slave will be disposed of after the first execution of a task.

Reviewing the source code it's seems like the nodes are deleting by a schedule that is triggered each 10 minutes.
I would like to know what the exact approach is and if there is an option to delete the node after the task is executed.

### Reference any relevant documentation, other materials or issues/pull requests that can be used for inspiration.

https://github.com/jenkinsci/openstack-cloud-plugin/blob/master/plugin/src/main/resources/jenkins/plugins/openstack/compute/SlaveOptions/help-retentionTime.html