Run the scheduled tests
:warning: Do not merge this PR!

PR 2/2: in order to finish running suite, rebase this PR on [`test-tokenizers-main`](https://github.com/huggingface/transformers/tree/test-tokenizers-main), branch of PR https://github.com/huggingface/transformers/pull/16708. 

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This PR builds on top of https://github.com/huggingface/transformers/pull/16708.

It leverages the docker images created in the PR above, and updates the channel in which to report the tests to be a dummy one.
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_16712). All of your documentation changes will be reflected on that endpoint.