chore(config): set min supported desktop to `2.7.0` #14544

Job	Run time
changes	3s
integration-sqlite (capabilities_features, 8.1, main)	1m 47s
integration-sqlite (collaboration_features, 8.1, main)	2m 18s
integration-sqlite (comments_features, 8.1, main)	1m 49s
integration-sqlite (dav_features, 8.1, main)	4m 53s
integration-sqlite (features, 8.1, main)	6m 45s
integration-sqlite (federation_features, 8.1, main)	3m 17s
integration-sqlite (--tags ~@large files_features, 8.1, main)	6m 55s
integration-sqlite (filesdrop_features, 8.1, main)	1m 38s
integration-sqlite (openldap_features, 8.1, main)	1m 35s
integration-sqlite (openldap_numerical_features, 8.1, main)	1m 26s
integration-sqlite (ldap_features, 8.1, main)	1m 54s
integration-sqlite (remoteapi_features, 8.1, main)	1m 15s
integration-sqlite (setup_features, 8.1, main)	1m 27s
integration-sqlite (sharees_features, 8.1, main)	3m 10s
integration-sqlite (sharing_features, 8.1, main)	9m 24s
integration-sqlite (videoverification_features, 8.1, main)	3m 44s
integration-sqlite-summary	5s
	53m 25s

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