NeVA Tutorial Notebook
@yaoyu-33  Verified `torchrun` can be executed in NeMo Container 1.23.10 within the notebook:

**Pretrain**: 
![torchrun-pretrain](https://github.com/NVIDIA/NeMo/assets/30813477/d4323996-795e-4d38-b5ab-a69e5acbecc8)

**Finetune**:
![neva-finetune](https://github.com/NVIDIA/NeMo/assets/30813477/bf9a2580-5a9f-4f90-96c6-2cf24db7d4e6)

**Inference**:
![neva-inference](https://github.com/NVIDIA/NeMo/assets/30813477/0662f743-6fc4-4173-9786-682545b1be01)
 jenkins jenkins
# What does this PR do ?

Adds NeVA tutorial for training / inference

**Collection**: Multimodal

# Changelog 
- New Jupyter notebook under `NeMo/tutorials/multimodal` outlining steps for pretraining and instruction fine-tuning NeVA

# Usage
* Documentation purposes

# Jenkins CI
To run Jenkins, a NeMo User with write access must comment `jenkins` on the PR.

# 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)
