feat: check the num of ILayer types and compare with ONNX-TRT in converter tests

[zewenli98]

Description

This PR enables checking the num of ILayer types and comparing with ONNX-TRT in converter tests.
To improve perf, we hope Torch-TRT to get the expected ILayer types for every single converter.
Since we observed on many models that ONNX-TRT generated TRT engines typically have better perf than Torch-TRT generated ones, to reduce perf gaps between Torch-TRT and ONNX-TRT, we introduce the mechanism to make sure Torch-TRT has the same num of ILayer types as ONNX-TRT.

Type of change

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• New feature (non-breaking change which adds functionality)

Checklist:

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