This PR is about improving STAC collection harvester (stac-to-iso19115-3.xsl conversion): add an online resource and cit:identifier for doi when available. (You can try it with stac collection like https://stacapi-cdos.apps.okd.crocc.meso.umontpellier.fr/collections, the stac harvester is a "URL simple" harvester, there is a "STAC collection" example configuration in harvester configuration panel).

(based on #9082, might need rebase)

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