private static void writeProbedOutputType(ApplicationPackage app, Path modelPath,
                                              String contextKey, TensorType type) throws IOException {
        String path = app.getFileReference(probedOutputTypesPath(modelPath)).getAbsolutePath();
        IOUtils.writeFile(path, contextKey + "\t" + type + "\n", true);
    }
Defers to 'vespa-analyze-onnx-model' to determine the output type given
a set of inputs. For situations with symbolic dimension sizes that can't
easily be determined.

@author lesters
config-model/src/main/java/com/yahoo/vespa/model/ml/OnnxModelProbe.java