[stable30] fix(encryption): Fix TypeError when trying to decrypt unencrypted file #29173

Job	Run time
changes	8s
integration-sqlite (collaboration_features, 8.1, stable30)	3m 28s
integration-sqlite (dav_features, 8.1, stable30)	5m 21s
integration-sqlite (federation_features, 8.1, stable30)	4m 9s
integration-sqlite (comments_features, 8.1, stable30)	2m 56s
integration-sqlite (capabilities_features, 8.1, stable30)	1m 54s
integration-sqlite (features, 8.1, stable30)	7m 41s
integration-sqlite (filesdrop_features, 8.1, stable30)	1m 55s
integration-sqlite (--tags ~@large files_features, 8.1, stable30)	11m 20s
integration-sqlite (theming_features, 8.1, stable30)	2m 23s
integration-sqlite (sharees_features, 8.1, stable30)	3m 10s
integration-sqlite (ldap_features, 8.1, stable30)	1m 55s
integration-sqlite (remoteapi_features, 8.1, stable30)	1m 59s
integration-sqlite (sharing_features, 8.1, stable30)	13m 53s
integration-sqlite (openldap_features, 8.1, stable30)	2m 13s
integration-sqlite (openldap_numerical_features, 8.1, stable30)	2m 5s
integration-sqlite (setup_features, 8.1, stable30)	1m 31s
integration-sqlite (videoverification_features, 8.1, stable30)	4m 1s
integration-sqlite-summary	5s
	1h 12m 7s

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