Check whether required tests are executed. (#19884)
### Description
Check the onnx node tests and model tests worked
### Motivation and Context
onnx node test data and model data are mount in one dir.
And onnxruntime_test_all search the dir and load the data.
If the dir does exist or there's some change in onnxruntime_test_all,
those tests may not be executed.
For example, all onnx node test data is 32M. It's hardly for us aware of
the regression.
So I add the simple check to ensure those tests are executed.
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Co-authored-by: Yi Zhang <your@email.com>
