Add OnnxConfig for SqueezeBert iss17314
# What does this PR do?

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As part of #16308, this PR adds OnnxConfig for SqueezeBert.
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## Who can review?
@lewtun @LysandreJik 

Anyone in the community is free to review the PR once the tests have passed. 

_The documentation is not available anymore as the PR was closed or merged._<|||||>I run pytest on those 4 failed tests in CircleCI shown above on my local dev, no error message was found, all says skipped except the following one says passed
tests/models/pegasus/test_modeling_pegasus.py::PegasusStandaloneDecoderModelTest::test_sample_generate


<|||||>Hi @lewtun,
running the following test did not show any errors, it output the following; 6 skipped, 200 deselected, 7 warnings
RUN_SLOW=1 pytest tests/onnx/test_onnx_v2.py -s -k "squeezebert"

