Consider changing all occurences of schema:url to iris

[C-Loftus]

in some of our integrations like wqp, we have schema:url as a raw string literal instead of an iri like

{
"@id": "test.com"
}

We could change this to be an iri, but at the same time it could be easier to just keep it as a string literal if we dont plan to use it as a node and ascribe properties to it

example:

            "provider": {
                "url": "https://www.waterqualitydata.us/beta/",
                "@type": "GovernmentOrganization",
                "name": "{{ data['OrganizationFormalName'] }}"
            },
            {%- if data['station_url'] %}
            "url": "{{ data['station_url'] | replace('https://www.waterqualitydata.us/provider', 'https://www.waterqualitydata.us/beta/provider') }}",
            {% endif -%}