Add deploy and REST API support to NeMo 2.0
> Changes LGTM but the deploy module was not included in the pip installer. So, having references in the collections might break the code for those who uses the pip installer. Can you please check with @ericharper to if this is Ok?

It's fine but needs to be import guarded @oyilmaz-nvidia I have added import guard to avoid the ImportError with import deploy for users that use pip installation. Can you please review it, thanks!
# What does this PR do ?

1. Adds `deploy` method from NeMo 1.0 as a `task` to NeMo 2.0 
2. This PR aims at minimum viable product to deploy and expose REST API with NeMo 2.0 and hence only adds `TRTLLM` backend route of deploy module to NeMo 2.0. Also, it only supports the basic arguments  for the export method. More optimizations like `paged_kv_cache`, `parallel_embedding`, `lora_plugin`, `multi_block_mode` etc., and other backends (like `in-framework`) will be supported in a subsequent PR.


**Collection**: [Note which collection this PR will affect]

# Changelog 
- Add specific line by line info of high level changes in this PR.

# Usage
* You can potentially add a usage example below

```python
# Add a code snippet demonstrating how to use this 
```

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# Before your PR is "Ready for review"
**Pre checks**:
- [ ] Make sure you read and followed [Contributor guidelines](https://github.com/NVIDIA/NeMo/blob/main/CONTRIBUTING.md)
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**PR Type**:
- [ ] New Feature
- [ ] Bugfix
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# Additional Information
* Related to # (issue)
