Added support for seed in `DataCollatorForWholeWordMask`
Author: capemox
Pull request: yes

# What does this PR do?
- Added support for seed in `DataCollatorForWholeWordMask`, following the same logic as in https://github.com/huggingface/transformers/pull/36497.
- Fixed bugs: Parameters `mask_replace_prob` and `random_replace_prob` were not being used. Instead, the values were hardcoded.
- Added tests
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Fixes #36655 


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@Rocketknight1 should review this!

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Comments:
Hi 👋, thank you for opening this pull request! The pull request is converted to draft by default. When it is ready for review, please click the `Ready for review` button (at the bottom of the PR page).

@Rocketknight1 ready for review now! Had to sort a couple of issues

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