Flexible passing args to TensorRTLLM in nemo_export.py

[janekl]

What does this PR do ?

Enabling user to pass arguments in nemo_export.py to TensorRT-LLM.export as the build API is constantly changing and besides some parameters needs to be set on per-model basis.

Collection: NLP

Changelog

• Add specific line by line info of high level changes in this PR.

Usage

python tests/export/nemo_export.py \
    --model_name=$MODEL_NAME \
    ...
    --trt_llm_export_kwargs='{"reduce_fusion": false, "gemm_plugin": "auto"}'

Default value or specyfing --trt_llm_export_kwargs='{}' results in empty kwargs.

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Additional Information

• Related to # (issue)

[oyilmaz-nvidia]

LGTM