Generation of OpenAPI for Backstage's Action's only processes a single entry for oneOf elements[1]. However following an upgrade of quarkus-openapi-generator to 1.3.8 we should be able to remove the workaround.

See https://issues.redhat.com/browse/KOGITO-9625 for details.

[1] https://github.com/manstis/backstage/blob/KOGITO-9338/plugins/swf-backend/src/service/OpenApiService.ts#L127