C2D: uploadResults endpoint

[alexcos20]

Let's configure start compute to allow results to be uploaded to a remote location.
Add a new endpoint that allows a c2d user to upload job results to a remote location after the job is finished if not configured at start.
If successful, then job results are deleted from the server, to save disk space.

Prerequisites:

• results must be present (if previously uploaded by calling this endpoint or specifying an output to startCompute/freeStartCompute, then action is rejected)