fix(files): conversion api simplification and conflict check #16378

Job	Run time
changes	5s
integration-sqlite (capabilities_features, 8.1, main)	1m 57s
integration-sqlite (collaboration_features, 8.1, main)	3m 43s
integration-sqlite (comments_features, 8.1, main)	3m 2s
integration-sqlite (dav_features, 8.1, main)	8m 21s
integration-sqlite (features, 8.1, main)	8m 47s
integration-sqlite (federation_features, 8.1, main)	5m 23s
integration-sqlite (--tags ~@large files_features, 8.1, main)	2m 14s
integration-sqlite (filesdrop_features, 8.1, main)	2m 11s
integration-sqlite (openldap_features, 8.1, main)	1m 34s
integration-sqlite (openldap_numerical_features, 8.1, main)	1m 56s
integration-sqlite (ldap_features, 8.1, main)	2m 47s
integration-sqlite (remoteapi_features, 8.1, main)	1m 42s
integration-sqlite (setup_features, 8.1, main)	1m 34s
integration-sqlite (sharees_features, 8.1, main)	4m 14s
integration-sqlite (sharing_features, 8.1, main)	15m 41s
integration-sqlite (videoverification_features, 8.1, main)	6m 1s
integration-sqlite-summary	6s
	1h 11m 18s

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