Task upload

[ihsaan-ullah]

• Upload new tasks using zip files (zip datasets and programs with a yaml file that is uploaded and becomes a task)
• During the upload, allow users to use already uploaded datasets (e.g. if you want to create a new task by uploading ingestion and scoring but you want to use already uploaded input and reference data)

[Didayolo]

During the upload, allow users to use already uploaded datasets (e.g. if you want to create a new task by uploading ingestion and scoring but you want to use already uploaded input and reference data)

How is this done when we dump a bundle using URI keys instead of files? Probably the logic is already implemented (include keys in competition.yaml instead of a file path.