Handle accessURL as a list

[jguo144]

Description

According to the DCAT schema accessURL must be a single URL string (https://resources.data.gov/resources/dcat-us/#distribution-accessURL). However, some catalogs sometimes provide a list of URLs instead. We should handle this edge case by selecting the first URL that uses a supported protocol.

Here's an example distribution where the accessURL is a list:

{
  "@type": "dcat:Distribution",
  "title": "PAD Homepage",
  "format": null,
  "accessURL": [
    "withheld",
    "withheld",
    "https://www.wildlife.ca.gov/Data/BIOS",
    "https://services2.arcgis.com/Uq9r85Potqm3MfRV/arcgis/rest/services/biosds69_fmu/FeatureServer",
    "http://dx.doi.org/doi:10.5066/F7X06527"
  ],
  "description": null
}

[orca-security-us]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca