feat: Serve well-known assetlinks json #3466

Job	Run time
changes	6s
integration-sqlite (capabilities_features, 8.2, main)	4m 48s
integration-sqlite (collaboration_features, 8.2, main)	5m 54s
integration-sqlite (comments_features, 8.2, main)	6m 18s
integration-sqlite (dav_features, 8.2, main)	8m 36s
integration-sqlite (features, 8.2, main)	10m 13s
integration-sqlite (federation_features, 8.2, main)	7m 3s
integration-sqlite (--tags ~@large files_features, 8.2, main)	10m 33s
integration-sqlite (filesdrop_features, 8.2, main)	4m 38s
integration-sqlite (openldap_features, 8.2, main)	4m 54s
integration-sqlite (openldap_numerical_features, 8.2, main)	5m 12s
integration-sqlite (ldap_features, 8.2, main)	5m 24s
integration-sqlite (remoteapi_features, 8.2, main)	4m 57s
integration-sqlite (setup_features, 8.2, main)	5m 12s
integration-sqlite (sharees_features, 8.2, main)	6m 55s
integration-sqlite (sharing_features, 8.2, main)	14m 42s
integration-sqlite (videoverification_features, 8.2, main)	7m 21s
integration-sqlite-summary	5s
	1h 52m 51s

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