Add TFDebertaV2ForMultipleChoice

[raghavanone]

What does this PR do?

Fixes #25537

Add TFDebertaV2ForMultipleChoice model

@ArthurZucker

[amyeroberts]

cc @Rocketknight1

[Rocketknight1]

Looks good to me! Seems like a clean port of the BERT code to DeBERTa-v2. One nitpick where a docstring wasn't changed, but other than that I think this is ready to merge!

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint.

[raghavanone]

@Rocketknight1 Not sure why this test fails.

[Rocketknight1]

That test is an issue with the CI rather than this PR, you can ignore it! Are you ready for me to merge now?

[raghavanone]

That test is an issue with the CI rather than this PR, you can ignore it! Are you ready for me to merge now?

Yes

[Rocketknight1]

Ugh, it won't let me merge, which means we'll need to rebase to get the tests working. Can you:

1. Pull the latest changes to your fork's main branch
2. In your local working repo, git checkout main and git pull to ensure your local main branch is up to date
3. In your local repo, git checkout fix_issue_25537 and then git pull and git rebase main to rebase onto the latest main branch
4. Finally, git push --force to upload the rebased branch to Github

After that, tests should pass!

[raghavanone]

Ugh, it won't let me merge, which means we'll need to rebase to get the tests working. Can you:

1. Pull the latest changes to your fork's main branch
2. In your local working repo, git checkout main and git pull to ensure your local main branch is up to date
3. In your local repo, git checkout fix_issue_25537 and then git pull and git rebase main to rebase onto the latest main branch
4. Finally, git push --force to upload the rebased branch to Github

After that, tests should pass!

Done, Lets hope the test passes.

[Rocketknight1]

Looks like everything's passing now - sorry about the CI issues, and thanks for a very clean and useful PR!