TRT LLM Integration with LORA

[agunapal]

Description

This PR integrates TRT-LLM with TorchServe

• Move handler from examples to torch_handler
• Update llama example to llama 3.1
• Update to latest trt-llm
• Add example for using LoRA model with trt-llm
• Added support for trt-llm with llm_launcher

Fixes #(issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Feature/Issue validation/testing

Please describe the Unit or Integration tests that you ran to verify your changes and relevant result summary. Provide instructions so it can be reproduced.
Please also list any relevant details for your test configuration.

• Test A
  Logs for Test A

• Test B
  Logs for Test B

Checklist:

• Did you have fun?
• Have you added tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

[mreso]

Good starting points, main concerns are that we're not leveraging async and git clone in llm_launcher

[mreso]

Does not look like the async part is working. Was this tested with at least 2 requests simultaneously and are we getting two interleaved streams?

[mreso]

LGTM now