[Bug]: stage-in should not include absolute path for root catalog.json

[ngachung]

Using UDS v9.0.0 image, stage-in produces catalog.json that has a link (root) to an absolute path that won't resolve when passed into a different cwl container

{
    "type": "Catalog",
    "id": "NA",
    "stac_version": "1.0.0",
    "description": "NA",
    "links": [
        {
            "rel": "root",
            "href": "/pfUwNL/catalog.json",
            "type": "application/json"
        },
        {
            "rel": "item",
            "href": "G2040068613-GES_DISC.stac.json",
            "type": "application/json"
        },
        {
            "rel": "item",
            "href": "G2040068619-GES_DISC.stac.json",
            "type": "application/json"
        }
    ]
}

Set root to 'catalog.json' works.