Update no trainer scripts to include gather for metrics
# What does this PR do?

Update run_wav2vec_pretraining_no_trainer example to include accelarator.gather_metrics

Related to #18437 

I ran the tests for tests for 'wav2vec_pretraining_no_trainer'  in 'test_pytorch_examples.py' files locally.

## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [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.
- [x] 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).
- [ ] Did you write any new necessary tests?


## Who can review?
@muellerzr  , @sgugger , @pacman100 
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.
_The documentation is not available anymore as the PR was closed or merged._