Update stage out (upload data to S3) to read catalog.json

[ngachung]

New Upload procedure:

• It will look for CATALOG_FILE Env variable for Catalog file location whcih is a valid STAC catalog.
• STAC catalog to have list of granules metadata files in "links"
  Example:

{
    "type": "Catalog",
    "stac_version": "1.0.0",
    "id": "sample-id",
    "description": "Reference: https://github.com/radiantearth/stac-spec/blob/master/examples/catalog.json",
    "links": [
        {
            "href": "/absolute/path/to/stac/granules/json/file",
            "rel": "child",
            "type": "application/json",
            "title": "<granules-id>"
        },
        {
            "href": "/absolute/path/to/stac/granules/json/file",
            "rel": "child",
            "type": "application/json",
            "title": "<granules-id>"
        }
    ]
}

• each metadata file is a valid STAC item.
• read each stac metadata to find necessary files in "assets"
• push the files to S3 using collection-id.
  • may need to pull the collection from U-DS to see if necessary files are there.
• update STAC metadata "assets" with S3 URL.
• upload STAC metadata file.

Need to update

• in catalog stage: it needs a new provider name.
• need a metadata parse from stac to CMR for Cumulus
• new step function workflow with the above provider name to take care of these files.