Merge pull request #19243 from nextcloud/enh/settings/admin_settings_to_info_xml

apps/settings/appinfo/info.xml

apps/settings/composer/composer/autoload_classmap.php

apps/settings/composer/composer/autoload_static.php

apps/settings/lib/Settings/Admin/Mail.php

apps/settings/lib/Settings/Admin/Overview.php

apps/settings/lib/Settings/Admin/Security.php

apps/settings/lib/Settings/Admin/Server.php

apps/settings/lib/Settings/Admin/Sharing.php

apps/settings/tests/Settings/Admin/MailTest.php

apps/settings/tests/Settings/Admin/SecurityTest.php

apps/settings/tests/Settings/Admin/ServerTest.php

apps/settings/tests/Settings/Admin/SharingTest.php

lib/private/Settings/Manager.php

tests/lib/Settings/ManagerTest.php