fix STAC pagination (E84 api)

[vincentsarago]

closes #121

[vincentsarago]

TODO

• check with https://earth-search.aws.element84.com/v0/search
• check with sat-api.devseed
• check with arturo cc @geospatial-jeff

other API we can test ?

[vincentsarago]

The proposed script will work with old and new API.

By default we will add page=X in the stac query (this is for old style API), For new API using Next links, user will need to use set the stac_next_link_key option to tell the backend to get the new query from the links.

with MosaicBackend(
    f"stac+{stac_endpoint}",
    query.copy(),
    11,
    14,
    backend_options={
        "accessor": lambda feature: feature["id"],
        "stac_next_link_key": "next",
    }
) as mosaic:

cc @geospatial-jeff