[REFACTOR] Move everything from `argilla/client/feedback` into `argilla/feedback`

[alvarobartt]

Describe the solution you'd like

As of the addition of the ArgillaTrainer for the FeedbackDataset datasets at https://github.com/argilla-io/argilla/pull/3151, the argilla/feedback module was created to define user-friendly imports as argilla.feedback instead of argilla.client.feedback.

Now the idea is to move everything to argilla/feedback to avoid having potentially duplicated imports and also to avoid confusion between both modules.

Additional context

This should be tackled once all the priorities are completed, and ideally we should keep some DeprecationWarnings for the stuff on argilla.client.feedback if applicable, because all the references point directly to import argilla as rg rather than the implicit imports instead.

[github-actions[bot]]

This issue is stale because it has been open for 90 days with no activity.

[github-actions[bot]]

This issue was closed because it has been inactive for 30 days since being marked as stale.