TensorRT OSS release corresponding to TensorRT 9.1.0.4 GA release.

Updates since TensorRT 8.6.1 GA release.

Key Features and Updates:

• Update the trt_python_plugin sample.
  • Python plugins API reference is part of the offical TRT Python API.
• Added samples demonstrating the usage of the progress monitor API.
  • Check sampleProgressMonitor for the C++ sample.
  • Check simple_progress_monitor for the Python sample.
• Remove dependencies related to python<3.8 in python samples as we no longer support python<3.8 for python samples.
• Demo changes
  • Added LAMBADA dataset accuracy checks in the HuggingFace demo.
  • Enabled structured sparsity and FP8 quantized batch matrix multiplication(BMM)s in attention in the NeMo demo.
  • Replaced deprecated APIs in the BERT demo.
• Updated tooling
  • Polygraphy v0.49.1