Feature Request: One-Shot Execution Mode

[esproul]

It would be great to have this option, utilizing Jenkins' OnceRetentionStrategy such that a given executor will only run one job.

The problem I'm having at the moment is migrating a job with blocking subproject builds from Google Cloud to Oracle. Without a one-shot mode, the subproject waits on a free executor from the instance that is running the main job, which is waiting on the completion of the subproject job. A classic deadlock ensues.

If I could configure my Jenkins OCI cloud to run everything in one-shot mode, the subproject would cause a new executor to be provisioned and the job would flow as intended.