feat: perform share mount validation on share instead of on mount #37136

Job	Run time
changes	9s
integration-sqlite (capabilities_features, 8.4, main, master)	1m 44s
integration-sqlite (comments_features, 8.4, main, master)	4m 28s
integration-sqlite (features, 8.4, main, master)	16m 59s
integration-sqlite (filesdrop_features, 8.4, main, master)	3m 45s
integration-sqlite (remoteapi_features, 8.4, main, master)	1m 17s
integration-sqlite (files_reminders, 8.4, main, master)	2m 39s
integration-sqlite (federation_features, 8.4, main, master)	8m 53s
integration-sqlite (ldap_features, 8.4, main, master)	3m 48s
integration-sqlite (file_conversions, 8.4, main, master)	1m 58s
integration-sqlite (collaboration_features, 8.4, main, master)	6m 51s
integration-sqlite (--tags ~@large files_features, 8.4, main, master)	23m 8s
integration-sqlite (videoverification_features, 8.4, main, master)	9m 28s
integration-sqlite (openldap_numerical_features, 8.4, main, master)	3m 4s
integration-sqlite (dav_features, 8.4, main, master)	14m 19s
integration-sqlite (theming_features, 8.4, main, master)	4m 18s
integration-sqlite (setup_features, 8.4, main, master)	2m 37s
integration-sqlite (routing_features, 8.4, main, master)	3m 33s
integration-sqlite (openldap_features, 8.4, main, master)	1m 38s
integration-sqlite (sharing_features, 8.4, main, master)	27m 19s
integration-sqlite (sharees_features, 8.4, main, master)	10m 49s
integration-sqlite-summary	5s
	2h 32m 49s

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