feat(oauth2): simple userinfo endpoint #2353

Job	Run time
changes	6s
integration-sqlite (capabilities_features, 8.2, main)	4m 3s
integration-sqlite (collaboration_features, 8.2, main)	5m 33s
integration-sqlite (comments_features, 8.2, main)	5m 16s
integration-sqlite (dav_features, 8.2, main)	8m 27s
integration-sqlite (features, 8.2, main)	9m 21s
integration-sqlite (federation_features, 8.2, main)	6m 31s
integration-sqlite (--tags ~@large files_features, 8.2, main)	10m 7s
integration-sqlite (filesdrop_features, 8.2, main)	4m 3s
integration-sqlite (openldap_features, 8.2, main)	4m 12s
integration-sqlite (openldap_numerical_features, 8.2, main)	4m 12s
integration-sqlite (ldap_features, 8.2, main)	4m 32s
integration-sqlite (remoteapi_features, 8.2, main)	3m 55s
integration-sqlite (setup_features, 8.2, main)	3m 51s
integration-sqlite (sharees_features, 8.2, main)	6m 21s
integration-sqlite (sharing_features, 8.2, main)	13m 29s
integration-sqlite (videoverification_features, 8.2, main)	7m 12s
integration-sqlite-summary	10s
	1h 41m 21s

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