Nemo 2.0 canonical lora
State: closed | Pull request: yes
Labels: name: CI

name: Run CICD

# What does this PR do ?

Add canonical LoRA (aka unfused LoRA) to NeMo 2.0.

This variant follows the HF implementation more closely and adds three separate adapters for attention q_proj, k_proj, and v_proj, as well as two separate adapters for MLP up_proj and gate_proj. In NeMo/Mcore, these are fused into one adapter for performance reasons.

Convergence test:
![image](https://github.com/user-attachments/assets/f4cdb1c5-1153-4664-9c9f-98b440eccee6)


**Collection**: [Note which collection this PR will affect]

# Changelog 
- Renamed `AdapterParallelAdd` to `LoRALinear` to be more explicit. 

# Usage
* You can potentially add a usage example below

```python
# Add a code snippet demonstrating how to use this 
```

# GitHub Actions CI

The Jenkins CI system has been replaced by GitHub Actions self-hosted runners.

The GitHub Actions CI will run automatically when the "Run CICD" label is added to the PR.
To re-run CI remove and add the label again.
To run CI on an untrusted fork, a NeMo user with write access must first click "Approve and run".

# 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)
- [ ] Did you write any new necessary tests?
- [ ] Did you add or update any necessary documentation?
- [ ] Does the PR affect components that are optional to install? (Ex: Numba, Pynini, Apex etc)
  - [ ] Reviewer: Does the PR have correct import guards for all optional libraries?
  
**PR Type**:
- [ ] New Feature
- [ ] Bugfix
- [ ] Documentation

If you haven't finished some of the above items you can still open "Draft" PR.


## Who can review?

Anyone in the community is free to review the PR once the checks have passed. 
[Contributor guidelines](https://github.com/NVIDIA/NeMo/blob/main/CONTRIBUTING.md) contains specific people who can review PRs to various areas.

# Additional Information
* Related to # (issue)


recipes + HF converters will be in subsequent PRs

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beep boop 🤖: 🚨 The following files must be fixed before merge!

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Your code was analyzed with PyLint. The following annotations have been identified:

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<!-- pylint-output-strict-mode-true -->

beep boop 🤖: 🚨 The following files must be fixed before merge!

---

Your code was analyzed with PyLint. The following annotations have been identified:

```

------------------------------------
Your code has been rated at 10.00/10
```

---

Thank you for improving NeMo's documentation!

[🤖]: Hi @cuichenx 👋,

We wanted to let you know that a [CICD pipeline](https://github.com/NVIDIA/NeMo/actions/runs/12046759323) for this PR just finished successfully

So it might be time to merge this PR or get some approvals

I'm just a bot so I'll leave it you what to do next.

//cc @pablo-garay @ko3n1g