Set the new terra-drs-hub parameter "cloudPlatform" to prefer downloading from Google #78
Description
Terra-drs-hub has been enhanced with a parameter to indicate the preferred cloud from which to download the data. The AnVIL drs_downloader should prefer to download from Google because it supports requester pays and is currently the primary cloud for AnVIL data.
The name of the parameter is cloudPlatform and it is set in the POST body when calling the resolve endpoint, as described in this section of the repo README and in the terra-drs-hub Swagger UI here.
Specifically, the field in the post body should be:
"cloudPlatform": "gs",
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