openstack_sdk-v0.21.4

Added

• Add --auth-helper-cmd for external AuthHelper (#1343)
• Drop connection_name from the AuthHelper (#1342)
• Implement CloudConfig construction from env (#1339)
• Add support for the oidcaccesstoken authentication (#1332)
• Introduce authentication helper (#1329)
• Add future federation login support (#1319)
• Make image.locations.metadata not required (#1318)
• Improve support for array with prefixItems (#1317)
• Ensure schemas are not duplicated (#1311)