fix(files_external): Respect explicit port configuration #39281

Job	Run time
changes	10s
integration-sqlite (collaboration_features, 8.4, main, master)	4m 5s
integration-sqlite (dav_features, 8.4, main, master)	12m 5s
integration-sqlite (--tags ~@large files_features, 8.4, main, master)	23m 47s
integration-sqlite (openldap_numerical_features, 8.4, main, master)	3m 3s
integration-sqlite (ldap_features, 8.4, main, master)	1m 50s
integration-sqlite (files_reminders, 8.4, main, master)	2m 44s
integration-sqlite (federation_features, 8.4, main, master)	6m 26s
integration-sqlite (openldap_features, 8.4, main, master)	2m 1s
integration-sqlite (file_conversions, 8.4, main, master)	2m 48s
integration-sqlite (videoverification_features, 8.4, main, master)	10m 51s
integration-sqlite (sharing_features, 8.4, main, master)	27m 16s
integration-sqlite (filesdrop_features, 8.4, main, master)	1m 52s
integration-sqlite (setup_features, 8.4, main, master)	1m 59s
integration-sqlite (capabilities_features, 8.4, main, master)	1m 58s
integration-sqlite (comments_features, 8.4, main, master)	3m 47s
integration-sqlite (routing_features, 8.4, main, master)	1m 35s
integration-sqlite (theming_features, 8.4, main, master)	2m 40s
integration-sqlite (sharees_features, 8.4, main, master)	17m 2s
integration-sqlite (remoteapi_features, 8.4, main, master)	2m 46s
integration-sqlite (features, 8.4, main, master)	25m 18s
integration-sqlite-summary	12s
	2h 36m 15s

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