fix: Don't crash if disabled user is missing in the database #11745

Job	Run time
changes	7s
integration-sqlite (capabilities_features, 8.1, main)	2m 37s
integration-sqlite (collaboration_features, 8.1, main)	3m 19s
integration-sqlite (comments_features, 8.1, main)	3m 29s
integration-sqlite (dav_features, 8.1, main)	10m 16s
integration-sqlite (features, 8.1, main)	11m 19s
integration-sqlite (federation_features, 8.1, main)	5m 13s
integration-sqlite (--tags ~@large files_features, 8.1, main)	13m 7s
integration-sqlite (filesdrop_features, 8.1, main)	2m 22s
integration-sqlite (openldap_features, 8.1, main)	2m 14s
integration-sqlite (openldap_numerical_features, 8.1, main)	2m 27s
integration-sqlite (ldap_features, 8.1, main)	2m 27s
integration-sqlite (remoteapi_features, 8.1, main)	1m 56s
integration-sqlite (setup_features, 8.1, main)	2m 10s
integration-sqlite (sharees_features, 8.1, main)	6m 26s
integration-sqlite (sharing_features, 8.1, main)	25m 8s
integration-sqlite (videoverification_features, 8.1, main)	7m 16s
integration-sqlite-summary	5s
	1h 41m 58s

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