add trust_remote_code option to CLI download cmd

# What does this PR do?

Add option to allow trust remote code download via CLI command

Address #24063 

Fixes # (issue)


## Before submitting
- [X] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case). #24063 
- [X] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
- [X] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case. #24063 
- [] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).

Could't find much documentation about `transformers-cli download`

- [X] Did you write any new necessary tests?

Added two test, one for a simple download pointing to `tmp` and check if folders `blobs,snapshots,refs` are present, and a test for `--trust-remote-code`.
Duplicated testing model https://huggingface.co/hf-internal-testing/test_dynamic_model_with_tokenizer adding a tokenizer to work as expected

## Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

@sgugger 

_The documentation is not available anymore as the PR was closed or merged._<|||||>@sgugger add the decorator, waiting to se if the tests here are passing. on my local env all the 4 test passes successfully 🤔 <|||||>The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_24097). All of your documentation changes will be reflected on that endpoint.