fix: Fix L0_onnx_execution_provider

[yinggeh]

What does the PR do?

Downgrade ORT version from 1.20.0 to 1.19.2.

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• fix

Related PRs:

triton-inference-server/onnxruntime_backend#284

Where should the reviewer start?

Test plan:

• CI Pipeline ID:
  20419664

Caveats:

Background

Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)

• closes GitHub issue: #xxx