Goal: 

• Have a set of APIs that mimics the pulp api for uploading content
•  

Acceptance Criteria:

• Add the following apis which proxy back to pulp:
  • Create an upload: https://pulpproject.org/pulpcore/restapi/#tag/Uploads/operation/uploads_create
    • Get an upload_href
  • Upload chunks: https://pulpproject.org/pulpcore/restapi/#tag/Uploads/operation/uploads_update
  • Finish the upload: https://pulpproject.org/pulpcore/restapi/#tag/Uploads/operation/uploads_commit
    • Get the artifact_href
• These would be rooted somewhere such as:
  • /api/content-sources/v1/pulp/
  • These would not be documented in the openapi spec (for now)
  • return whatever pulp's error is
• example Curl commands to run to show it using the 3 apis